Ignore IOException when saving layout (maybe another process is writing to the layout file).

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5436 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/UsageDataCollector/UsageDataCollector/UsageDataSessionWriter.cs

@@ -303,9 +303,8 @@ namespace ICSharpCode.UsageDataCollector
 		static string GetTypeName(Exception exception)
 		{
 			string type = exception.GetType().FullName;
-			ExternalException ee = exception as ExternalException;
-			if (ee != null)
-				return type + " (ErrorCode " + ee.ErrorCode.ToString("x8") + ")";
+			if (exception is ExternalException || exception is System.IO.IOException)
+				return type + " (" + Marshal.GetHRForException(ee).ToString("x8") + ")";
 			else
 				return type;
 		}

src/Main/Base/Project/Src/Gui/Workbench/Layouts/AvalonDockLayout.cs

@@ -309,7 +309,12 @@ namespace ICSharpCode.SharpDevelop.Gui
 					Directory.CreateDirectory(configPath);
 					string fileName = Path.Combine(configPath, current.FileName);
 					LoggingService.Info("Saving layout file: " + fileName);
+					try {
 						dockingManager.SaveLayout(fileName);
+					} catch (IOException ex) {
+						// ignore IO errors (maybe switching layout in two SharpDevelop instances at once?)
+						LoggingService.Warn(ex);
+					}
 				}
 			} catch (Exception e) {
 				MessageService.ShowException(e);