1. create a status label for debugging status.

2. if the NGEN flag cannot be set, move on.

Debugger/Debugger.Core/ManagedCallback.cs

@@ -323,7 +323,11 @@ namespace Debugger
 			// disable NGen
 			ICorDebugProcess2 pProcess2 = pProcess as ICorDebugProcess2;
 			if (pProcess2 != null && Process.DebugMode == DebugModeFlag.Debug) {
-				pProcess2.SetDesiredNGENCompilerFlags((uint)CorDebugJITCompilerFlags.CORDEBUG_JIT_DISABLE_OPTIMIZATION);
+				try {
+					pProcess2.SetDesiredNGENCompilerFlags((uint)CorDebugJITCompilerFlags.CORDEBUG_JIT_DISABLE_OPTIMIZATION);
+				} catch (COMException) {
+					// we cannot set the NGEN flag => no evaluation for optimized code.
+				}
 			}
 			
 			ExitCallback();

ILSpy/Commands/DebuggerCommands.cs

@@ -8,6 +8,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Interop;
+using System.Windows.Media;
 
 using ILSpy.Debugger;
 using ILSpy.Debugger.Bookmarks;
@@ -106,6 +107,8 @@ namespace ICSharpCode.ILSpy.Commands
 			EnableDebuggerUI(false);
 			CurrentDebugger.DebugStopped += OnDebugStopped;
 			CurrentDebugger.IsProcessRunningChanged += CurrentDebugger_IsProcessRunningChanged;
+			
+			MainWindow.Instance.SetStatus("Running...", Brushes.Black);
 		}
 		
 		protected void OnDebugStopped(object sender, EventArgs e)
@@ -113,6 +116,8 @@ namespace ICSharpCode.ILSpy.Commands
 			EnableDebuggerUI(true);
 			CurrentDebugger.DebugStopped -= OnDebugStopped;
 			CurrentDebugger.IsProcessRunningChanged -= CurrentDebugger_IsProcessRunningChanged;
+			
+			MainWindow.Instance.SetStatus("Stand by...", Brushes.Black);
 		}
 		
 		protected void EnableDebuggerUI(bool enable)
@@ -144,6 +149,7 @@ namespace ICSharpCode.ILSpy.Commands
 		{
 			if (CurrentDebugger.IsProcessRunning) {
 				//SendWpfWindowPos(this, HWND_BOTTOM);
+				MainWindow.Instance.SetStatus("Running...", Brushes.Black);
 				return;
 			}
 			
@@ -158,6 +164,8 @@ namespace ICSharpCode.ILSpy.Commands
 				
 				MainWindow.Instance.TextView.UnfoldAndScroll(CurrentLineBookmark.Instance.LineNumber);
 			}
+			
+			MainWindow.Instance.SetStatus("Debugging...", Brushes.Red);
 		}
 	}
 	
@@ -195,8 +203,10 @@ namespace ICSharpCode.ILSpy.Commands
 	{
 		public override void Execute(object parameter)
 		{
-			if (CurrentDebugger.IsDebugging && !CurrentDebugger.IsProcessRunning)
+			if (CurrentDebugger.IsDebugging && !CurrentDebugger.IsProcessRunning) {
 				CurrentDebugger.Continue();
+				MainWindow.Instance.SetStatus("Running...", Brushes.Black);
+			}
 		}
 	}
 	

ILSpy/MainWindow.xaml

@@ -33,17 +33,25 @@
 	</Window.CommandBindings>
 	<DockPanel>
 		<!-- Main menu -->
-		<Menu DockPanel.Dock="Top" Name="mainMenu">
-			<MenuItem Header="_File" /> <!-- contents of file menu are added using MEF -->
-			<MenuItem Header="_View">
-				<MenuItem Header="Show _internal types and members" IsCheckable="True" IsChecked="{Binding FilterSettings.ShowInternalApi}">
-					<MenuItem.Icon>
-						<Image Width="16" Height="16" Source="Images/PrivateInternal.png" />
-					</MenuItem.Icon>
+		<DockPanel DockPanel.Dock="Top" Background="{DynamicResource {x:Static SystemColors.MenuBrushKey}}">
+			<Menu DockPanel.Dock="Left" Name="mainMenu">
+				<MenuItem Header="_File" /> <!-- contents of file menu are added using MEF -->
+				<MenuItem Header="_View">
+					<MenuItem Header="Show _internal types and members" IsCheckable="True" IsChecked="{Binding FilterSettings.ShowInternalApi}">
+						<MenuItem.Icon>
+							<Image Width="16" Height="16" Source="Images/PrivateInternal.png" />
+						</MenuItem.Icon>
+					</MenuItem>
+					<MenuItem Header="Show _analyzer" Name="showAnalyzer" IsCheckable="True" Checked="ShowAnalyzer_Checked" Unchecked="ShowAnalyzer_Unchecked" />
 				</MenuItem>
-				<MenuItem Header="Show _analyzer" Name="showAnalyzer" IsCheckable="True" Checked="ShowAnalyzer_Checked" Unchecked="ShowAnalyzer_Unchecked" />
-			</MenuItem>
-		</Menu>
+			</Menu>
+			<TextBlock VerticalAlignment="Center"
+			           HorizontalAlignment="Right"
+			           DockPanel.Dock="Right"
+			           x:Name="StatusLabel"
+			           Width="70"
+			           Text="Stand by..."/>
+		</DockPanel>
 		<!-- ToolBar -->
 		<ToolBar
 			Name="toolBar"

ILSpy/MainWindow.xaml.cs

@@ -29,6 +29,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Interop;
+using System.Windows.Media;
 using System.Windows.Media.Imaging;
 
 using ICSharpCode.Decompiler;
@@ -563,5 +564,11 @@ namespace ICSharpCode.ILSpy
 		{
 			treeView.UnselectAll();
 		}
+		
+		public void SetStatus(string status, Brush foreground)
+		{
+			this.StatusLabel.Foreground = foreground;
+			this.StatusLabel.Text = status;
+		}
 	}
 }