diff --git a/src/Calculator/Controls/CalculationResult.cpp b/src/Calculator/Controls/CalculationResult.cpp
index 8896617f..90563752 100644
--- a/src/Calculator/Controls/CalculationResult.cpp
+++ b/src/Calculator/Controls/CalculationResult.cpp
@@ -118,17 +118,17 @@ void CalculationResult::OnTextContainerLayoutUpdated(Object^ /*sender*/, Object^
     }
 }
 
-void CalculationResult::TextContainerSizeChanged(Object^ sender, SizeChangedEventArgs^ /*e*/)
+void CalculationResult::TextContainerSizeChanged(Object^ /*sender*/, SizeChangedEventArgs^ /*e*/)
 {
     UpdateTextState();
 }
 
-void CalculationResult::OnIsActivePropertyChanged(bool /*oldValue*/, bool newValue)
+void CalculationResult::OnIsActivePropertyChanged(bool /*oldValue*/, bool /*newValue */)
 {
     UpdateVisualState();
 }
 
-void CalculationResult::OnAccentColorPropertyChanged(Brush^ oldValue, Brush^ newValue)
+void CalculationResult::OnAccentColorPropertyChanged(Brush^ /*oldValue*/, Brush^ /*newValue*/)
 {
     // Force the "Active" transition to happen again
     if (IsActive)
diff --git a/src/Calculator/Views/Calculator.xaml.cpp b/src/Calculator/Views/Calculator.xaml.cpp
index d8ae99c9..10858a30 100644
--- a/src/Calculator/Views/Calculator.xaml.cpp
+++ b/src/Calculator/Views/Calculator.xaml.cpp
@@ -277,7 +277,7 @@ void Calculator::OnLayoutStateChanged(_In_ Object^ sender, _In_ Object^ e)
     UpdatePanelViewState();
 }
 
-void Calculator::OnIsStandardPropertyChanged(bool /*oldValue*/, bool newValue)
+void Calculator::OnIsStandardPropertyChanged(bool /*oldValue*/, bool /*newValue*/)
 {
     UpdateViewState();
     UpdatePanelViewState();
diff --git a/src/Calculator/Views/DateCalculator.xaml.cpp b/src/Calculator/Views/DateCalculator.xaml.cpp
index 0df8cd3e..42fdf915 100644
--- a/src/Calculator/Views/DateCalculator.xaml.cpp
+++ b/src/Calculator/Views/DateCalculator.xaml.cpp
@@ -102,7 +102,7 @@ void DateCalculator::FromDate_DateChanged(_In_ CalendarDatePicker^ sender, _In_
     {
         auto dateCalcViewModel = safe_cast<DateCalculatorViewModel^>(this->DataContext);
         dateCalcViewModel->FromDate = e->NewDate->Value;
-        TraceLogger::GetInstance().LogDateDifferenceModeUsed(ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()));
+        TraceLogger::GetInstance().LogDateDifferenceModeUsed();
     }
     else
     {
@@ -116,7 +116,7 @@ void DateCalculator::ToDate_DateChanged(_In_ CalendarDatePicker^ sender, _In_ Ca
     {
         auto dateCalcViewModel = safe_cast<DateCalculatorViewModel^>(this->DataContext);
         dateCalcViewModel->ToDate = e->NewDate->Value;
-        TraceLogger::GetInstance().LogDateDifferenceModeUsed(ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()));
+        TraceLogger::GetInstance().LogDateDifferenceModeUsed();
     }
     else
     {
diff --git a/src/CalculatorUnitTests/CalcInputTest.cpp b/src/CalculatorUnitTests/CalcInputTest.cpp
index 8d6f630b..551fbd71 100644
--- a/src/CalculatorUnitTests/CalcInputTest.cpp
+++ b/src/CalculatorUnitTests/CalcInputTest.cpp
@@ -31,18 +31,18 @@ namespace CalculatorUnitTests
             m_calcInput.TryBeginExponent();
             m_calcInput.TryAddDigit(3, 10, false, L"999", 64, 32);
 
-            VERIFY_ARE_EQUAL(L"-1.2e+3", m_calcInput.ToString(10, false), L"Verify input is correct.");
+            VERIFY_ARE_EQUAL(L"-1.2e+3", m_calcInput.ToString(10), L"Verify input is correct.");
 
             m_calcInput.Clear();
 
-            ::Logger::WriteMessage(m_calcInput.ToString(10, false).c_str());
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify input is 0 after clear.");
+            ::Logger::WriteMessage(m_calcInput.ToString(10).c_str());
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify input is 0 after clear.");
         }
 
         TEST_METHOD(TryToggleSignZero)
         {
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(false, L"999"), L"Verify toggling 0 succeeds.");
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify toggling 0 does not create -0.");
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify toggling 0 does not create -0.");
         }
         TEST_METHOD(TryToggleSignExponent)
         {
@@ -50,23 +50,23 @@ namespace CalculatorUnitTests
             m_calcInput.TryBeginExponent();
             m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32);
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(false, L"999"), L"Verify toggling exponent sign succeeds.");
-            VERIFY_ARE_EQUAL(L"1.e-2", m_calcInput.ToString(10, false), L"Verify toggling exponent sign does not toggle base sign.");
+            VERIFY_ARE_EQUAL(L"1.e-2", m_calcInput.ToString(10), L"Verify toggling exponent sign does not toggle base sign.");
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(false, L"999"), L"Verify toggling exponent sign succeeds.");
-            VERIFY_ARE_EQUAL(L"1.e+2", m_calcInput.ToString(10, false), L"Verify toggling negative exponent sign does not toggle base sign.");
+            VERIFY_ARE_EQUAL(L"1.e+2", m_calcInput.ToString(10), L"Verify toggling negative exponent sign does not toggle base sign.");
         }
         TEST_METHOD(TryToggleSignBase)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(false, L"999"), L"Verify toggling base sign succeeds.");
-            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10, false), L"Verify toggling base sign creates negative base.");
+            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10), L"Verify toggling base sign creates negative base.");
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(false, L"999"), L"Verify toggling base sign succeeds.");
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify toggling negative base sign creates positive base.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify toggling negative base sign creates positive base.");
         }
         TEST_METHOD(TryToggleSignBaseIntegerMode)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(true, L"999"), L"Verify toggling base sign in integer mode succeeds.");
-            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10, false), L"Verify toggling base sign creates negative base.");
+            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10), L"Verify toggling base sign creates negative base.");
         }
         TEST_METHOD(TryToggleSignRollover)
         {
@@ -75,7 +75,7 @@ namespace CalculatorUnitTests
             VERIFY_IS_TRUE(m_calcInput.TryToggleSign(true, L"127"), L"Verify toggling base sign in integer mode succeeds.");
             m_calcInput.TryAddDigit(8, 10, false, L"999", 64, 32);
             VERIFY_IS_FALSE(m_calcInput.TryToggleSign(true, L"127"), L"Verify toggling base sign in integer mode fails on rollover.");
-            VERIFY_ARE_EQUAL(L"-128", m_calcInput.ToString(10, false), L"Verify toggling base sign on rollover does not change value.");
+            VERIFY_ARE_EQUAL(L"-128", m_calcInput.ToString(10), L"Verify toggling base sign on rollover does not change value.");
         }
 
         TEST_METHOD(TryAddDigitLeadingZeroes)
@@ -83,26 +83,26 @@ namespace CalculatorUnitTests
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(0, 10, false, L"999", 64, 32), L"Verify TryAddDigit succeeds.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(0, 10, false, L"999", 64, 32), L"Verify TryAddDigit succeeds.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(0, 10, false, L"999", 64, 32), L"Verify TryAddDigit succeeds.");
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify leading zeros are ignored.");
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify leading zeros are ignored.");
         }
         TEST_METHOD(TryAddDigitMaxCount)
         {
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32), L"Verify TryAddDigit for base with length < maxDigits succeeds.");
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify adding digit for base with length < maxDigits succeeded.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify adding digit for base with length < maxDigits succeeded.");
             VERIFY_IS_FALSE(m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 1), L"Verify TryAddDigit for base with length > maxDigits fails.");
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify digit for base was not added.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify digit for base was not added.");
             m_calcInput.TryBeginExponent();
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32), L"Verify TryAddDigit for exponent with length < maxDigits succeeds.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32), L"Verify TryAddDigit for exponent with length < maxDigits succeeds.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(3, 10, false, L"999", 64, 32), L"Verify TryAddDigit for exponent with length < maxDigits succeeds.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(4, 10, false, L"999", 64, 32), L"Verify TryAddDigit for exponent with length < maxDigits succeeds.");
             VERIFY_IS_FALSE(m_calcInput.TryAddDigit(5, 10, false, L"999", 64, 32), L"Verify TryAddDigit for exponent with length > maxDigits fails.");
-            VERIFY_ARE_EQUAL(L"1.e+1234", m_calcInput.ToString(10, false), L"Verify adding digits for exponent with length < maxDigits succeeded.");
+            VERIFY_ARE_EQUAL(L"1.e+1234", m_calcInput.ToString(10), L"Verify adding digits for exponent with length < maxDigits succeeded.");
 
             m_calcInput.Clear();
             m_calcInput.TryAddDecimalPt();
             VERIFY_IS_TRUE(m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 1), L"Verify decimal point and leading zero does not count toward maxDigits.");
-            VERIFY_ARE_EQUAL(L"0.1", m_calcInput.ToString(10, false), L"Verify input value checking dec pt and leading zero impact on maxDigits.");
+            VERIFY_ARE_EQUAL(L"0.1", m_calcInput.ToString(10), L"Verify input value checking dec pt and leading zero impact on maxDigits.");
         }
         TEST_METHOD(TryAddDigitValues)
         {
@@ -181,7 +181,7 @@ namespace CalculatorUnitTests
             VERIFY_IS_FALSE(m_calcInput.HasDecimalPt(), L"Verify input has no decimal point.");
             VERIFY_IS_TRUE(m_calcInput.TryAddDecimalPt(), L"Verify adding decimal to empty input.");
             VERIFY_IS_TRUE(m_calcInput.HasDecimalPt(), L"Verify input has decimal point.");
-            VERIFY_ARE_EQUAL(L"0.", m_calcInput.ToString(10, false), L"Verify decimal on empty input.");
+            VERIFY_ARE_EQUAL(L"0.", m_calcInput.ToString(10), L"Verify decimal on empty input.");
         }
         TEST_METHOD(TryAddDecimalPointTwice)
         {
@@ -202,7 +202,7 @@ namespace CalculatorUnitTests
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             VERIFY_IS_TRUE(m_calcInput.TryBeginExponent(), L"Verify adding exponent succeeds on input without exponent.");
-            VERIFY_ARE_EQUAL(L"1.e+0", m_calcInput.ToString(10, false), L"Verify exponent present.");
+            VERIFY_ARE_EQUAL(L"1.e+0", m_calcInput.ToString(10), L"Verify exponent present.");
         }
         TEST_METHOD(TryBeginExponentWithExponent)
         {
@@ -214,31 +214,31 @@ namespace CalculatorUnitTests
         TEST_METHOD(BackspaceZero)
         {
             m_calcInput.Backspace();
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify backspace on 0 is still 0.");
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify backspace on 0 is still 0.");
         }
         TEST_METHOD(BackspaceSingleChar)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify input before backspace.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify input before backspace.");
             m_calcInput.Backspace();
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify input after backspace.");
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify input after backspace.");
         }
         TEST_METHOD(BackspaceMultiChar)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"12", m_calcInput.ToString(10, false), L"Verify input before backspace.");
+            VERIFY_ARE_EQUAL(L"12", m_calcInput.ToString(10), L"Verify input before backspace.");
             m_calcInput.Backspace();
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify input after backspace.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify input after backspace.");
         }
         TEST_METHOD(BackspaceDecimal)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDecimalPt();
-            VERIFY_ARE_EQUAL(L"1.", m_calcInput.ToString(10, false), L"Verify input before backspace.");
+            VERIFY_ARE_EQUAL(L"1.", m_calcInput.ToString(10), L"Verify input before backspace.");
             VERIFY_IS_TRUE(m_calcInput.HasDecimalPt(), L"Verify input has decimal point.");
             m_calcInput.Backspace();
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, false), L"Verify input after backspace.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify input after backspace.");
             VERIFY_IS_FALSE(m_calcInput.HasDecimalPt(), L"Verify decimal point was removed.");
         }
         TEST_METHOD(BackspaceMultiCharDecimal)
@@ -247,47 +247,47 @@ namespace CalculatorUnitTests
             m_calcInput.TryAddDecimalPt();
             m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(3, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"1.23", m_calcInput.ToString(10, false), L"Verify input before backspace.");
+            VERIFY_ARE_EQUAL(L"1.23", m_calcInput.ToString(10), L"Verify input before backspace.");
             m_calcInput.Backspace();
-            VERIFY_ARE_EQUAL(L"1.2", m_calcInput.ToString(10, false), L"Verify input after backspace.");
+            VERIFY_ARE_EQUAL(L"1.2", m_calcInput.ToString(10), L"Verify input after backspace.");
         }
 
         TEST_METHOD(SetDecimalSymbol)
         {
             m_calcInput.TryAddDecimalPt();
-            VERIFY_ARE_EQUAL(L"0.", m_calcInput.ToString(10, false), L"Verify default decimal point.");
+            VERIFY_ARE_EQUAL(L"0.", m_calcInput.ToString(10), L"Verify default decimal point.");
             m_calcInput.SetDecimalSymbol(L',');
-            VERIFY_ARE_EQUAL(L"0,", m_calcInput.ToString(10, false), L"Verify new decimal point.");
+            VERIFY_ARE_EQUAL(L"0,", m_calcInput.ToString(10), L"Verify new decimal point.");
         }
 
         TEST_METHOD(ToStringEmpty)
         {
-            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10, false), L"Verify ToString of empty value.");
+            VERIFY_ARE_EQUAL(L"0", m_calcInput.ToString(10), L"Verify ToString of empty value.");
         }
         TEST_METHOD(ToStringNegative)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryToggleSign(false, L"999");
-            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10, false), L"Verify ToString of negative value.");
+            VERIFY_ARE_EQUAL(L"-1", m_calcInput.ToString(10), L"Verify ToString of negative value.");
         }
         TEST_METHOD(ToStringExponentBase10)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryBeginExponent();
-            VERIFY_ARE_EQUAL(L"1.e+0", m_calcInput.ToString(10, false), L"Verify ToString of empty base10 exponent.");
+            VERIFY_ARE_EQUAL(L"1.e+0", m_calcInput.ToString(10), L"Verify ToString of empty base10 exponent.");
         }
         TEST_METHOD(ToStringExponentBase8)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryBeginExponent();
-            VERIFY_ARE_EQUAL(L"1.^+0", m_calcInput.ToString(8, false), L"Verify ToString of empty base8 exponent.");
+            VERIFY_ARE_EQUAL(L"1.^+0", m_calcInput.ToString(8), L"Verify ToString of empty base8 exponent.");
         }
         TEST_METHOD(ToStringExponentNegative)
         {
             m_calcInput.TryAddDigit(1, 8, false, L"999", 64, 32);
             m_calcInput.TryBeginExponent();
             m_calcInput.TryToggleSign(false, L"999");
-            VERIFY_ARE_EQUAL(L"1.e-0", m_calcInput.ToString(10, false), L"Verify ToString of empty negative exponent.");
+            VERIFY_ARE_EQUAL(L"1.e-0", m_calcInput.ToString(10), L"Verify ToString of empty negative exponent.");
         }
         TEST_METHOD(ToStringExponentPositive)
         {
@@ -296,12 +296,12 @@ namespace CalculatorUnitTests
             m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(3, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(4, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"1.e+234", m_calcInput.ToString(10, false), L"Verify ToString of exponent with value.");
+            VERIFY_ARE_EQUAL(L"1.e+234", m_calcInput.ToString(10), L"Verify ToString of exponent with value.");
         }
         TEST_METHOD(ToStringInteger)
         {
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10, true), L"Verify ToString of integer value hides decimal.");
+            VERIFY_ARE_EQUAL(L"1", m_calcInput.ToString(10), L"Verify ToString of integer value hides decimal.");
         }
         TEST_METHOD(ToStringBaseTooLong)
         {
@@ -311,7 +311,7 @@ namespace CalculatorUnitTests
                 maxStr += L"1";
                 m_calcInput.TryAddDigit(1, 10, false, maxStr, 64, 100);
             }
-            auto result = m_calcInput.ToString(10, false);
+            auto result = m_calcInput.ToString(10);
             VERIFY_IS_TRUE(result.empty(), L"Verify ToString of base value that is too large yields empty string.");
         }
         TEST_METHOD(ToStringExponentTooLong)
@@ -328,7 +328,7 @@ namespace CalculatorUnitTests
                     exponentCapped = true;
                 }
             }
-            auto result = m_calcInput.ToString(10, false);
+            auto result = m_calcInput.ToString(10);
 
             // TryAddDigit caps the exponent length to C_EXP_MAX_DIGITS = 4, so ToString() succeeds.
             // If that cap is removed, ToString() should return an empty string.
@@ -347,7 +347,7 @@ namespace CalculatorUnitTests
             m_calcInput.TryAddDigit(1, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(2, 10, false, L"999", 64, 32);
             m_calcInput.TryAddDigit(3, 10, false, L"999", 64, 32);
-            VERIFY_ARE_EQUAL(L"123", m_calcInput.ToString(10, false), L"Verify input before conversion to rational.");
+            VERIFY_ARE_EQUAL(L"123", m_calcInput.ToString(10), L"Verify input before conversion to rational.");
 
             auto rat = m_calcInput.ToRational(10, false);
             VERIFY_ARE_EQUAL(1, rat.P().Mantissa().size(), L"Verify digit count of rational.");
diff --git a/src/CalculatorUnitTests/CalculatorManagerTest.cpp b/src/CalculatorUnitTests/CalculatorManagerTest.cpp
index 37ceb429..cdf8a6f2 100644
--- a/src/CalculatorUnitTests/CalculatorManagerTest.cpp
+++ b/src/CalculatorUnitTests/CalculatorManagerTest.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 #include "pch.h"
@@ -40,7 +40,7 @@ namespace CalculatorManagerTest
         {
             m_isError = isError;
         }
-        void SetExpressionDisplay(_Inout_ std::shared_ptr<CalculatorVector<std::pair<std::wstring, int>>> const &tokens, _Inout_ std::shared_ptr<CalculatorVector<std::shared_ptr<IExpressionCommand>>> const &commands)
+        void SetExpressionDisplay(_Inout_ std::shared_ptr<CalculatorVector<std::pair<std::wstring, int>>> const &tokens, _Inout_ std::shared_ptr<CalculatorVector<std::shared_ptr<IExpressionCommand>>> const & /*commands*/)
         {
             m_expression.clear();
             unsigned int nTokens = 0;
@@ -79,7 +79,7 @@ namespace CalculatorManagerTest
             return m_isError;
         }
 
-        void OnHistoryItemAdded(_In_ unsigned int addedItemIndex)
+        void OnHistoryItemAdded(_In_ unsigned int /*addedItemIndex */)
         {
         }
 
@@ -98,7 +98,7 @@ namespace CalculatorManagerTest
             m_binaryOperatorReceivedCallCount++;
         }
 
-        void MemoryItemChanged(unsigned int indexOfMemory)
+        void MemoryItemChanged(unsigned int /*indexOfMemory*/)
         {
         }
 
diff --git a/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj b/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
index f7e40b2c..d199044c 100644
--- a/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
+++ b/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
@@ -137,6 +137,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">
@@ -144,6 +146,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
@@ -151,6 +155,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
@@ -158,6 +164,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
@@ -165,6 +173,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -172,6 +182,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -179,6 +191,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -186,6 +200,8 @@
       <AdditionalOptions>/bigobj /await /std:c++17 /permissive- /Zc:twoPhase- %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)CalcManager;$(SolutionDir)CalcViewModel;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup>
diff --git a/src/CalculatorUnitTests/CurrencyConverterUnitTests.cpp b/src/CalculatorUnitTests/CurrencyConverterUnitTests.cpp
index ab7fa7e6..9eb289ca 100644
--- a/src/CalculatorUnitTests/CurrencyConverterUnitTests.cpp
+++ b/src/CalculatorUnitTests/CurrencyConverterUnitTests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 #include "pch.h"
@@ -74,15 +74,15 @@ public:
         m_task_completion_event{ tce }
     {}
 
-    void CurrencyDataLoadFinished(bool didLoad) override
+    void CurrencyDataLoadFinished(bool /*didLoad*/) override
     {
         m_task_completion_event.set();
     }
 
-    void CurrencySymbolsCallback(_In_ const wstring& fromSymbol, _In_ const wstring& toSymbol) override {}
-    void CurrencyRatiosCallback(_In_ const wstring& ratioEquality, _In_ const wstring& accRatioEquality) override {}
-    void CurrencyTimestampCallback(_In_ const std::wstring& timestamp, bool isWeekOldData) override {}
-    void NetworkBehaviorChanged(_In_ int newBehavior) override {}
+    void CurrencySymbolsCallback(_In_ const wstring& /*fromSymbol*/, _In_ const wstring& /*toSymbol*/) override {}
+    void CurrencyRatiosCallback(_In_ const wstring& /*ratioEquality*/, _In_ const wstring& /*accRatioEquality*/) override {}
+    void CurrencyTimestampCallback(_In_ const std::wstring& /*timestamp*/, bool /*isWeekOldData*/) override {}
+    void NetworkBehaviorChanged(_In_ int /*newBehavior*/) override {}
 
 private:
     Concurrency::task_completion_event<void> m_task_completion_event;
diff --git a/src/CalculatorUnitTests/HistoryTests.cpp b/src/CalculatorUnitTests/HistoryTests.cpp
index 8036ec15..a22ae83a 100644
--- a/src/CalculatorUnitTests/HistoryTests.cpp
+++ b/src/CalculatorUnitTests/HistoryTests.cpp
@@ -42,7 +42,7 @@ namespace CalculatorFunctionalTests
         HistoryViewModel^ m_historyViewModel;
         StandardCalculatorViewModel^ m_standardViewModel;
 
-        void Initialize(unsigned int windowId = 0)
+        void Initialize(unsigned int /*windowId*/ = 0)
         {
             m_standardViewModel = ref new StandardCalculatorViewModel();
             m_standardViewModel->IsStandard = true;
@@ -50,7 +50,7 @@ namespace CalculatorFunctionalTests
             m_historyViewModel->SetCalculatorDisplay(m_standardViewModel->m_calculatorDisplay);
         }
 
-        void Cleanup(unsigned int windowId = 0)
+        void Cleanup(unsigned int /*windowId*/ = 0)
         {
             m_standardViewModel->m_standardCalculatorManager.SendCommand(Command::ModeBasic);
             m_historyViewModel->OnClearCommand(nullptr);
@@ -100,7 +100,6 @@ namespace CalculatorFunctionalTests
         void AddMaxHistoryItems(unsigned int windowId = 0)
         {
             Initialize(windowId);
-            int initialSize = m_historyViewModel->ItemSize;
             m_standardViewModel->m_standardCalculatorManager.SendCommand(Command::Command1);
             m_standardViewModel->m_standardCalculatorManager.SendCommand(Command::CommandADD);
             m_standardViewModel->m_standardCalculatorManager.SendCommand(Command::Command1);
diff --git a/src/CalculatorUnitTests/UnitConverterTest.cpp b/src/CalculatorUnitTests/UnitConverterTest.cpp
index ef6601db..91902e98 100644
--- a/src/CalculatorUnitTests/UnitConverterTest.cpp
+++ b/src/CalculatorUnitTests/UnitConverterTest.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 #include "pch.h"
@@ -116,7 +116,7 @@ namespace UnitConverterUnitTests
             return m_ratioMaps[u];
         }
 
-        bool SupportsCategory(const Category& target)
+        bool SupportsCategory(const Category& /*target*/)
         {
             return true;
         }
diff --git a/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.cpp b/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.cpp
index e9e7817e..7a36cd1e 100644
--- a/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.cpp
+++ b/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 #include "pch.h"
@@ -234,7 +234,7 @@ namespace CalculatorUnitTests
         return wstring(L"");
     }
 
-    void UnitConverterMock::DeSerialize(const wstring& serializedData)
+    void UnitConverterMock::DeSerialize(const wstring& /*serializedData*/)
     {
         m_deSerializeCallCount++;
     }
@@ -244,7 +244,7 @@ namespace CalculatorUnitTests
         return L"TEST";
     };
 
-    void UnitConverterMock::RestoreUserPreferences(_In_ const std::wstring& userPreferences)
+    void UnitConverterMock::RestoreUserPreferences(_In_ const std::wstring& /*userPreferences*/)
     {
     };
 
diff --git a/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.h b/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.h
index d56e22ad..1e1b57c8 100644
--- a/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.h
+++ b/src/CalculatorUnitTests/UnitConverterViewModelUnitTests.h
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 #include "pch.h"
@@ -41,7 +41,7 @@ namespace CalculatorUnitTests
             void RestoreUserPreferences(_In_ const std::wstring& userPreferences) override;
             void SendCommand(UCM::Command command) override;
             void SetViewModelCallback(const std::shared_ptr<UCM::IUnitConverterVMCallback>& newCallback) override;
-            void SetViewModelCurrencyCallback(_In_ const std::shared_ptr<UCM::IViewModelCurrencyCallback>& newCallback) override {}
+            void SetViewModelCurrencyCallback(_In_ const std::shared_ptr<UCM::IViewModelCurrencyCallback>& /*newCallback*/) override {}
             concurrency::task<std::pair<bool, std::wstring>> RefreshCurrencyRatios() override
             {
                 co_return std::make_pair(L"", L"");