Patch by Alex Prudkiy: fixed random UnauthorizedAccessException when saving file

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3628 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Project/Src/Services/File/OpenedFile.cs

@@ -216,7 +216,14 @@ namespace ICSharpCode.SharpDevelop
 			if (safeSaving) {
 				DateTime creationTime = File.GetCreationTimeUtc(FileName);
 				File.Delete(FileName);
-				File.Move(saveAs, FileName);
+				try {
+					File.Move(saveAs, FileName);
+				} catch (UnauthorizedAccessException) {
+					// sometime File.Move raise exception (TortoiseSVN, Anti-vir ?)
+					// try again after short delay
+					System.Threading.Thread.Sleep(250);
+					File.Move(saveAs, FileName);
+				}
 				File.SetCreationTimeUtc(FileName, creationTime);
 			}
 			IsDirty = false;