Introduced a very simple "singleton" service-locator, which allowed for a removal of specific implementations which were very limited. With this it's easier to access dependencies.

GreenshotPlugin/Interfaces/Plugin/IGreenshotHost.cs

@@ -0,0 +1,48 @@
+using System.Drawing;
+
+namespace Greenshot.Plugin
+{
+    /// <summary>
+    /// This interface is the GreenshotPluginHost, that which "Hosts" the plugin.
+    /// For Greenshot this is implemented in the PluginHelper
+    /// </summary>
+    public interface IGreenshotHost {
+        /// <summary>
+        /// Create a Thumbnail
+        /// </summary>
+        /// <param name="image">Image of which we need a Thumbnail</param>
+        /// <param name="width"></param>
+        /// <param name="height"></param>
+        /// <returns>Image with Thumbnail</returns>
+        Image GetThumbnail(Image image, int width, int height);
+
+        /// <summary>
+        /// Export a surface to the destination with has the supplied designation
+        /// </summary>
+        /// <param name="manuallyInitiated"></param>
+        /// <param name="designation"></param>
+        /// <param name="surface"></param>
+        /// <param name="captureDetails"></param>
+        ExportInformation ExportCapture(bool manuallyInitiated, string designation, ISurface surface, ICaptureDetails captureDetails);
+
+        /// <summary>
+        /// Make region capture with specified Handler
+        /// </summary>
+        /// <param name="captureMouseCursor">bool false if the mouse should not be captured, true if the configuration should be checked</param>
+        /// <param name="destination">IDestination destination</param>
+        void CaptureRegion(bool captureMouseCursor, IDestination destination);
+
+        /// <summary>
+        /// Use the supplied capture, and handle it as if it's captured.
+        /// </summary>
+        /// <param name="captureToImport">ICapture to import</param>
+        void ImportCapture(ICapture captureToImport);
+
+        /// <summary>
+        /// Use the supplied image, and ICapture a capture object for it
+        /// </summary>
+        /// <param name="imageToCapture">Image to create capture for</param>
+        /// <returns>ICapture</returns>
+        ICapture GetCapture(Image imageToCapture);
+    }
+}