Fix NullReferenceException in ParameterCanBeDemotedIssue

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Parser/FoldingVisitor.cs

@@ -180,6 +180,8 @@ namespace CSharpBinding.Parser
 		#region Comments
 		public override void VisitComment(Comment comment)
 		{
+			if (comment.CommentType == CommentType.InactiveCode)
+				return; // don't fold the inactive code comment; instead fold the preprocessor directives
 			if (AreTwoSinglelineCommentsInConsecutiveLines(comment.PrevSibling as Comment, comment))
 				return; // already handled by previous comment
 			Comment lastComment = comment;
@@ -203,9 +205,6 @@ namespace CSharpBinding.Parser
 						case CommentType.Documentation:
 							folding.Name = "/// ...";
 							break;
-						case CommentType.InactiveCode:
-							folding.Name = "inactive code";
-							break;
 						case CommentType.MultiLineDocumentation:
 							folding.Name = "/** ... */";
 							break;

src/Libraries/NRefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/ParameterCanBeDemotedIssue/ParameterCanBeDemotedIssue.cs

@@ -119,6 +119,8 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 			void ProcessParameter(ParameterDeclaration parameter, AstNode rootResolutionNode, TypeCriteriaCollector collector)
 			{
 				var localResolveResult = ctx.Resolve(parameter) as LocalResolveResult;
+				if (localResolveResult == null)
+					return;
 				var variable = localResolveResult.Variable;
 				var typeKind = variable.Type.Kind;
 				if (!(typeKind == TypeKind.Class ||

src/Libraries/NRefactory/ICSharpCode.NRefactory/Editor/ReadOnlyDocument.cs

@@ -270,17 +270,17 @@ namespace ICSharpCode.NRefactory.Editor
 		
 		void IDocument.Insert(int offset, ITextSource text)
 		{
-			throw new NotImplementedException();
+			throw new NotSupportedException();
 		}
 		
 		void IDocument.Insert(int offset, ITextSource text, AnchorMovementType defaultAnchorMovementType)
 		{
-			throw new NotImplementedException();
+			throw new NotSupportedException();
 		}
 		
 		void IDocument.Replace(int offset, int length, ITextSource newText)
 		{
-			throw new NotImplementedException();
+			throw new NotSupportedException();
 		}
 		
 		void IDocument.StartUndoableAction()

src/Libraries/NRefactory/ICSharpCode.NRefactory/Utils/LazyInit.cs

@@ -35,7 +35,7 @@ namespace ICSharpCode.NRefactory.Utils
 		}
 		
 		/// <summary>
-		/// Atomatically performs the following operation:
+		/// Atomically performs the following operation:
 		/// - If target is null: stores newValue in target and returns newValue.
 		/// - If target is not null: returns target.
 		/// </summary>