Fix async warning LoadDebugInfo

ILSpy/Commands/SelectPdbContextMenuEntry.cs

@@ -29,7 +29,7 @@ namespace ICSharpCode.ILSpy
 	[ExportContextMenuEntry(Header = nameof(Resources.SelectPDB))]
 	class SelectPdbContextMenuEntry : IContextMenuEntry
 	{
-		public void Execute(TextViewContext context)
+		public async void Execute(TextViewContext context)
 		{
 			var assembly = (context.SelectedTreeNodes?.FirstOrDefault() as AssemblyTreeNode)?.LoadedAssembly;
 			if (assembly == null)
@@ -43,7 +43,7 @@ namespace ICSharpCode.ILSpy
 
 			using (context.TreeView.LockUpdates())
 			{
-				assembly.LoadDebugInfo(dlg.FileName);
+				await assembly.LoadDebugInfo(dlg.FileName);
 			}
 
 			MainWindow.Instance.SelectNode(MainWindow.Instance.FindNodeByPath(new[] { assembly.FileName }, true));