Fold the result "Open Explorer" button into output extensions

Six command outputs ended with the same AddButton(OpenExplorer ...) +
WriteLine() tail. Add AddOpenFolderButton / AddRevealFileButton on
ISmartTextOutput and route each site through them. This also drops the
no-op `isFile ? path : path` in the package-extraction output, which now
picks the reveal vs open helper directly.

Assisted-by: Claude:claude-opus-4-8:Claude Code

ILSpy/Commands/CreateDiagramContextMenuEntry.cs

@@ -99,8 +99,7 @@ namespace ILSpy.Commands
 			output.WriteLine();
 			output.WriteLine();
 			var diagramHtml = Path.Combine(outputFolder, "index.html");
-			output.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.RevealFile(diagramHtml));
+			output.AddRevealFileButton(diagramHtml);
-			output.WriteLine();
 			return output;
 		}
 

ILSpy/Commands/ExtractPackageEntryContextMenuEntry.cs

@@ -133,9 +133,10 @@ namespace ILSpy.Commands
 				output.Write(string.Format(Resources.GenerationCompleteInSeconds, stopwatch.Elapsed.TotalSeconds.ToString("F1")));
 				output.WriteLine();
 				output.WriteLine();
-				var openTarget = isFile ? path : path;
+				if (isFile)
-				output.AddButton(null, Resources.OpenExplorer, (_, _) => { if (isFile) ShellHelper.RevealFile(openTarget); else ShellHelper.OpenFolder(openTarget); });
+					output.AddRevealFileButton(path);
-				output.WriteLine();
+				else
+					output.AddOpenFolderButton(path);
 				return output;
 			}, token)).ConfigureAwait(true);
 		}

ILSpy/Commands/PdbGenerator.cs

@@ -136,8 +136,7 @@ namespace ILSpy.Commands
 				output.Write(string.Format(Resources.GenerationCompleteInSeconds, totalWatch.Elapsed.TotalSeconds.ToString("F1")));
 				output.WriteLine();
 				output.WriteLine();
-				output.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.OpenFolder(folder));
+				output.AddOpenFolderButton(folder);
-				output.WriteLine();
 				return output;
 			}, token)).ConfigureAwait(true);
 		}

ILSpy/Commands/ProjectExport.cs

@@ -86,9 +86,7 @@ namespace ILSpy.Commands
 				o.WriteLine();
 				if (result.Success && Directory.Exists(options.OutputDirectory))
 				{
-					o.AddButton(null, ICSharpCode.ILSpy.Properties.Resources.OpenExplorer,
+					o.AddOpenFolderButton(options.OutputDirectory);
-						(_, _) => ShellHelper.OpenFolder(options.OutputDirectory));
-					o.WriteLine();
 				}
 				return o;
 			});

ILSpy/Commands/SaveCodeHelper.cs

@@ -81,8 +81,7 @@ namespace ILSpy.Commands
 					o.WriteLine();
 					if (Path.GetDirectoryName(path) is { Length: > 0 } directory)
 					{
-						o.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.OpenFolder(directory));
+						o.AddOpenFolderButton(directory);
-						o.WriteLine();
 					}
 					return o;
 				}, token), node.Text?.ToString()).ConfigureAwait(true);

ILSpy/Commands/SolutionExport.cs

@@ -82,8 +82,7 @@ namespace ILSpy.Commands
 				o.WriteLine();
 				if (result.Success && Path.GetDirectoryName(path) is { Length: > 0 } directory)
 				{
-					o.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.OpenFolder(directory));
+					o.AddOpenFolderButton(directory);
-					o.WriteLine();
 				}
 				return o;
 			}).ConfigureAwait(true);

ILSpy/SmartTextOutputExtensions.cs

@@ -25,12 +25,35 @@ using Avalonia.Interactivity;
 using Avalonia.Layout;
 using Avalonia.Media;
 
+using ICSharpCode.ILSpy.Properties;
+
 using ILSpy.TextView;
+using ILSpy.Util;
 
 namespace ILSpy
 {
 	public static class SmartTextOutputExtensions
 	{
+		/// <summary>
+		/// Appends the standard "Open Explorer" result button that opens <paramref name="folder"/> in
+		/// the OS file manager, followed by a blank line. Shared tail of the export / save / PDB outputs.
+		/// </summary>
+		public static void AddOpenFolderButton(this ISmartTextOutput output, string folder)
+		{
+			output.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.OpenFolder(folder));
+			output.WriteLine();
+		}
+
+		/// <summary>
+		/// Appends an "Open Explorer" result button that reveals <paramref name="file"/> in the OS file
+		/// manager (selecting it where supported), followed by a blank line.
+		/// </summary>
+		public static void AddRevealFileButton(this ISmartTextOutput output, string file)
+		{
+			output.AddButton(null, Resources.OpenExplorer, (_, _) => ShellHelper.RevealFile(file));
+			output.WriteLine();
+		}
+
 		public static void AddButton(this ISmartTextOutput output, IImage? icon, string text, EventHandler<RoutedEventArgs> click)
 		{
 			ArgumentNullException.ThrowIfNull(output);