diff --git a/ICSharpCode.Decompiler/CSharp/Annotations.cs b/ICSharpCode.Decompiler/CSharp/Annotations.cs
index 9af04a298..064da15f2 100644
--- a/ICSharpCode.Decompiler/CSharp/Annotations.cs
+++ b/ICSharpCode.Decompiler/CSharp/Annotations.cs
@@ -99,19 +99,25 @@ namespace ICSharpCode.Decompiler.CSharp
 		}
 		
 		/// <summary>
-		/// Retrieves the symbol associated with this AstNode, or null if no symbol is associated with the node.
+		/// Retrieves the <see cref="ISymbol"/> associated with this AstNode, or null if no symbol is associated with the node.
 		/// </summary>
 		public static ISymbol GetSymbol(this AstNode node)
 		{
 			var rr = node.Annotation<ResolveResult>();
 			return rr != null ? rr.GetSymbol() : null;
 		}
-		
+
+		/// <summary>
+		/// Retrieves the <see cref="ResolveResult"/> associated with this <see cref="AstNode"/>, or <see cref="ErrorResolveResult.UnknownError"/> if no resolve result is associated with the node.
+		/// </summary>
 		public static ResolveResult GetResolveResult(this AstNode node)
 		{
 			return node.Annotation<ResolveResult>() ?? ErrorResolveResult.UnknownError;
 		}
-		
+
+		/// <summary>
+		/// Retrieves the <see cref="ILVariable"/> associated with this <see cref="IdentifierExpression"/>, or <c>null</c> if no variable is associated with this identifier.
+		/// </summary>
 		public static ILVariable GetILVariable(this IdentifierExpression expr)
 		{
 			var rr = expr.Annotation<ResolveResult>() as ILVariableResolveResult;
@@ -120,7 +126,10 @@ namespace ICSharpCode.Decompiler.CSharp
 			else
 				return null;
 		}
-		
+
+		/// <summary>
+		/// Retrieves the <see cref="ILVariable"/> associated with this <see cref="VariableInitializer"/>, or <c>null</c> if no variable is associated with this initializer.
+		/// </summary>
 		public static ILVariable GetILVariable(this VariableInitializer vi)
 		{
 			var rr = vi.Annotation<ResolveResult>() as ILVariableResolveResult;
@@ -130,6 +139,9 @@ namespace ICSharpCode.Decompiler.CSharp
 				return null;
 		}
 
+		/// <summary>
+		/// Retrieves the <see cref="ILVariable"/> associated with this <see cref="ForeachStatement"/>, or <c>null</c> if no variable is associated with this foreach statement.
+		/// </summary>
 		public static ILVariable GetILVariable(this ForeachStatement loop)
 		{
 			var rr = loop.Annotation<ResolveResult>() as ILVariableResolveResult;
@@ -139,18 +151,27 @@ namespace ICSharpCode.Decompiler.CSharp
 				return null;
 		}
 
+		/// <summary>
+		/// Adds an <see cref="ILVariable"/> to this initializer.
+		/// </summary>
 		public static VariableInitializer WithILVariable(this VariableInitializer vi, ILVariable v)
 		{
 			vi.AddAnnotation(new ILVariableResolveResult(v, v.Type));
 			return vi;
 		}
 
+		/// <summary>
+		/// Adds an <see cref="ILVariable"/> to this foreach statement.
+		/// </summary>
 		public static ForeachStatement WithILVariable(this ForeachStatement loop, ILVariable v)
 		{
 			loop.AddAnnotation(new ILVariableResolveResult(v, v.Type));
 			return loop;
 		}
 
+		/// <summary>
+		/// Copies all annotations from <paramref name="other"/> to <paramref name="node"/>.
+		/// </summary>
 		public static T CopyAnnotationsFrom<T>(this T node, AstNode other) where T : AstNode
 		{
 			foreach (object annotation in other.Annotations) {
@@ -159,6 +180,9 @@ namespace ICSharpCode.Decompiler.CSharp
 			return node;
 		}
 
+		/// <summary>
+		/// Copies all <see cref="ILInstruction"/> annotations from <paramref name="other"/> to <paramref name="node"/>.
+		/// </summary>
 		public static T CopyInstructionsFrom<T>(this T node, AstNode other) where T : AstNode
 		{
 			foreach (object annotation in other.Annotations.OfType<ILInstruction>()) {
@@ -168,6 +192,9 @@ namespace ICSharpCode.Decompiler.CSharp
 		}
 	}
 	
+	/// <summary>
+	/// Represents a reference to a local variable.
+	/// </summary>
 	public class ILVariableResolveResult : ResolveResult
 	{
 		public readonly ILVariable Variable;
@@ -183,6 +210,9 @@ namespace ICSharpCode.Decompiler.CSharp
 		}
 	}
 
+	/// <summary>
+	/// Annotates a <see cref="ForeachStatement"/> with the instructions for the GetEnumerator, MoveNext and get_Current calls.
+	/// </summary>
 	public class ForeachAnnotation
 	{
 		public readonly ILInstruction GetEnumeratorCall;