Fixed completion bug.

ICSharpCode.NRefactory.CSharp/Completion/CSharpCompletionEngine.cs

@@ -1,4 +1,4 @@
-// 
+// 
 // CSharpCompletionEngine.cs
 //  
 // Author:
@@ -320,7 +320,9 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 					if (controlSpace && isAsExpression != null && isAsExpression.Node is VariableDeclarationStatement && token != "new") {
 						var parent = isAsExpression.Node as VariableDeclarationStatement;
 						var proposeNameList = new CompletionDataWrapper(this);
-					
+						if (parent.Variables.Count != 1)
+							return DefaultControlSpaceItems(isAsExpression, controlSpace);
+
 						foreach (var possibleName in GenerateNameProposals (parent.Type)) {
 							if (possibleName.Length > 0) {
 								proposeNameList.Result.Add(factory.CreateLiteralCompletionData(possibleName.ToString()));

ICSharpCode.NRefactory.Tests/CSharp/CodeCompletion/CodeCompletionBugTests.cs

@@ -4859,5 +4859,30 @@ namespace Test
 			Assert.IsNull (provider.Find ("Dispose"), "'Dispose' found.");
 		}
 
+
+		/// <summary>
+		/// Bug 4085 - code completion problem with generic dictionary
+		/// </summary>
+		[Test()]
+		public void TestBug4085 ()
+		{
+			// Name proposal feature breaks here
+			var provider = CreateCtrlSpaceProvider (
+@"using System.Collections.Generic;
+namespace Test
+{
+	class TestClass
+	{
+		static void Main()
+		{
+			$IDictionary<string, TestClass> foo = new Dictionary<string, $
+		}
+	}
+}
+
+");
+			Assert.IsNotNull (provider.Find ("TestClass"), "'TestClass' not found.");
+		}
+
 	}
 }