Add 'open containing folder' and 'open command line here' commands.

ILSpy/MainWindow.xaml.cs

@@ -661,8 +661,20 @@ namespace ICSharpCode.ILSpy
 				// just ignore all of them.
 			}
 		}
+
+		public static void ExecuteCommand(string fileName, string arguments)
+		{
+			try {
+				Process.Start(fileName, arguments);
+#pragma warning disable RECS0022 // A catch clause that catches System.Exception and has an empty body
+			} catch (Exception) {
+#pragma warning restore RECS0022 // A catch clause that catches System.Exception and has an empty body
+				// Process.Start can throw several errors (not all of them documented),
+				// just ignore all of them.
+			}
+		}
 		#endregion
-		
+
 		#region Open/Refresh
 		void OpenCommandExecuted(object sender, ExecutedRoutedEventArgs e)
 		{

ILSpy/TreeNodes/AssemblyTreeNode.cs

@@ -434,4 +434,69 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			MainWindow.Instance.CurrentAssemblyList.RefreshSave();
 		}
 	}
+
+	[ExportContextMenuEntry(Header = "_Open Containing Folder", Category = "Shell")]
+	sealed class OpenContainingFolder : IContextMenuEntry
+	{
+		public bool IsVisible(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return false;
+			return context.SelectedTreeNodes
+				.All(n => n is AssemblyTreeNode a && File.Exists(a.LoadedAssembly.FileName));
+		}
+
+		public bool IsEnabled(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return false;
+			return context.SelectedTreeNodes
+				.All(n => n is AssemblyTreeNode a && File.Exists(a.LoadedAssembly.FileName));
+		}
+
+		public void Execute(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return;
+			foreach (var node in context.SelectedTreeNodes.OfType<AssemblyTreeNode>()) {
+				var path = node.LoadedAssembly.FileName;
+				if (File.Exists(path)) {
+					MainWindow.ExecuteCommand("explorer.exe", $"/select,\"{path}\"");
+				}
+			}
+		}
+	}
+
+	[ExportContextMenuEntry(Header = "_Open Command Line Here", Category = "Shell")]
+	sealed class OpenCmdHere : IContextMenuEntry
+	{
+		public bool IsVisible(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return false;
+			return context.SelectedTreeNodes
+				.All(n => n is AssemblyTreeNode a && File.Exists(a.LoadedAssembly.FileName));
+		}
+
+		public bool IsEnabled(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return false;
+			return context.SelectedTreeNodes
+				.All(n => n is AssemblyTreeNode a && File.Exists(a.LoadedAssembly.FileName));
+		}
+
+		public void Execute(TextViewContext context)
+		{
+			if (context.SelectedTreeNodes == null)
+				return;
+			foreach (var node in context.SelectedTreeNodes.OfType<AssemblyTreeNode>()) {
+				var path = Path.GetDirectoryName(node.LoadedAssembly.FileName);
+				if (Directory.Exists(path)) {
+					MainWindow.ExecuteCommand("cmd.exe", $"/k \"cd {path}\"");
+				}
+			}
+		}
+	}
+
 }