Fixed simple warnings like redundant using directives, unused variables and added some missing xml comments.

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/DesignPanel.cs

@@ -35,7 +35,6 @@ using ICSharpCode.WpfDesign.Designer.Controls;
 using ICSharpCode.WpfDesign.UIExtensions;
 using ICSharpCode.WpfDesign.Designer.Xaml;
 using ICSharpCode.WpfDesign.Extensions;
-using System.Linq;
 
 namespace ICSharpCode.WpfDesign.Designer
 {

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/PointTrackerPlacementSupport.cs

@@ -47,7 +47,6 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 		public override void Arrange(AdornerPanel panel, UIElement adorner, Size adornedElementSize)
 		{
 			Point p = new Point(0, 0);
-			double distance = 0;
 			if (shape is Line)
 			{
 				var s = shape as Line;

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.XamlDom/Project/XamlObject.cs

@@ -206,6 +206,10 @@ namespace ICSharpCode.WpfDesign.XamlDom
 		}
 
 		private XamlType _systemXamlTypeForProperty = null;
+		
+		/// <summary>
+		/// Gets a <see cref="XamlType"/> representing the <see cref="XamlObject.ElementType"/>.
+		/// </summary>
 		public XamlType SystemXamlTypeForProperty
 		{
 			get

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.XamlDom/Project/XamlParser.cs

@@ -607,7 +607,7 @@ namespace ICSharpCode.WpfDesign.XamlDom
 				{
 					propertyInfo = FindProperty(elementInstance, propertyType, propertyName);
 				}
-				catch (Exception ex)
+				catch (Exception)
 				{ }
 				if (propertyInfo != null)
 					return propertyInfo;

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.XamlDom/Project/XamlProperty.cs

@@ -250,6 +250,10 @@ namespace ICSharpCode.WpfDesign.XamlDom
 		}
 
 		private XamlMember _systemXamlMemberForProperty = null;
+		
+		/// <summary>
+		/// Gets a <see cref="XamlMember"/> representing the property. 
+		/// </summary>
 		public XamlMember SystemXamlMemberForProperty
 		{
 			get
@@ -261,6 +265,10 @@ namespace ICSharpCode.WpfDesign.XamlDom
 		}
 
 		private XamlType _systemXamlTypeForProperty = null;
+		
+		/// <summary>
+		/// Gets a <see cref="XamlType"/> representing the type the property is declared on. 
+		/// </summary>
 		public XamlType SystemXamlTypeForProperty
 		{
 			get

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.XamlDom/Project/XamlTypeFinder.cs

@@ -304,6 +304,9 @@ namespace ICSharpCode.WpfDesign.XamlDom
 			return WpfTypeFinder.Instance.Clone();
 		}
 		
+		/// <summary>
+		/// Converts the specified <see cref="Uri"/> to local.
+		/// </summary>
 		public virtual Uri ConvertUriToLocalUri(Uri uri)
 		{
 			return uri;

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/DesignItem.cs

@@ -199,6 +199,9 @@ namespace ICSharpCode.WpfDesign
 			}
 		}
 
+		/// <summary>
+		/// Reapplies all extensions.
+		/// </summary>
 		public void ReapplyAllExtensions()
 		{
 			var manager = this.Services.GetService<Extensions.ExtensionManager>();
@@ -293,6 +296,9 @@ namespace ICSharpCode.WpfDesign
 		/// </summary>
 		public abstract DesignItem Clone();
 		
+		/// <summary>
+		/// Gets a <see cref="Transform"/> that represents all transforms applied to the item's view.
+		/// </summary>
 		public Transform GetCompleteAppliedTransformationToView()
 		{
 			var retVal = new TransformGroup();

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/DrawItemExtension.cs

@@ -29,7 +29,20 @@ namespace ICSharpCode.WpfDesign
 	/// </summary>
 	public interface IDrawItemExtension
 	{
+		/// <summary>
+		/// Returns if the specified type can be drawn.
+		/// </summary>
+		/// <param name="createItemType">The type to check.</param>
+		/// <returns>True if the specified type can be drawn, otherwise false.</returns>
 		bool CanItemBeDrawn(Type createItemType);
+		
+		/// <summary>
+		/// Starts to draw.
+		/// </summary>
+		/// <param name="clickedOn">The item.</param>
+		/// <param name="createItemType">The item type.</param>
+		/// <param name="panel">The design panel to draw on.</param>
+		/// <param name="e">The <see cref="MouseEventArgs"/> argument that initiated the draw operation.</param>
 		void StartDrawItem(DesignItem clickedOn, Type createItemType, IDesignPanel panel, MouseEventArgs e);
 	}
 }

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Extensions/Extension.cs

@@ -33,16 +33,29 @@ namespace ICSharpCode.WpfDesign.Extensions
 	/// </remarks>
 	public abstract class Extension
 	{
+		/// <summary>
+		/// Gets the value of the <see cref="DisabledExtensionsProperty"/> attached property for an object.
+		/// </summary>
+		/// <param name="obj">The object from which the property value is read.</param>
+		/// <returns>The object's <see cref="DisabledExtensionsProperty"/> property value.</returns>
 		public static string GetDisabledExtensions(DependencyObject obj)
 		{
 			return (string)obj.GetValue(DisabledExtensionsProperty);
 		}
 
+		/// <summary>
+		/// Sets the value of the <see cref="DisabledExtensionsProperty"/> attached property for an object. 
+		/// </summary>
+		/// <param name="obj">The object to which the attached property is written.</param>
+		/// <param name="value">The value to set.</param>
 		public static void SetDisabledExtensions(DependencyObject obj, string value)
 		{
 			obj.SetValue(DisabledExtensionsProperty, value);
 		}
 
+		/// <summary>
+		/// Gets or sets a semicolon-separated list with extension names that is disabled for a component's view.
+		/// </summary>
 		public static readonly DependencyProperty DisabledExtensionsProperty =
 			DependencyProperty.RegisterAttached("DisabledExtensions", typeof(string), typeof(Extension), new PropertyMetadata(null));
 

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Extensions/ExtensionAttribute.cs

@@ -26,7 +26,9 @@ namespace ICSharpCode.WpfDesign.Extensions
 	[AttributeUsage(AttributeTargets.Class, AllowMultiple=false, Inherited=false)]
 	public sealed class ExtensionAttribute : Attribute
 	{
-	    //The Order in wich the Extensions are used
+		/// <summary>
-        public int Order { get; set; }
+		/// Gets or sets the Order in wich the extensions are used.
+		/// </summary>
+		public int Order { get; set; }
 	}
 }

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Extensions/ExtensionServer.cs

@@ -74,8 +74,8 @@ namespace ICSharpCode.WpfDesign.Extensions
 		/// </summary>
 		public abstract bool ShouldApplyExtensions(DesignItem extendedItem);
 		
-		// <summary>
+		/// <summary>
-		/// Set if the Extension Server should be reaplied (For multiple Selection extension Server for Example!)
+		/// Returns if the Extension Server should be reapplied (for multiple selection extension server for example).
 		/// </summary>
 		public virtual bool ShouldBeReApplied() 
 		{