Fixed build.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.1@2310 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/UnitTesting/Test/Utils/MockProjectContent.cs

@@ -159,5 +159,11 @@ namespace UnitTesting.Tests.Utils
 				ReferencedContentsChanged(this, new EventArgs());
 			}
 		}
+		
+		public bool IsUpToDate {
+			get {
+				throw new NotImplementedException();
+			}
+		}
 	}
 }