Archival notice

Author: christophwille

README.md

@@ -1,3 +1,15 @@
+# Archival Notice
+
+As outlined in issue #136 we were looking for maintainers, but nobody stepped forward. Thus it has been unmaintained for a very long period of time, 
+and we decided to archive the repository.
+
+Alternative: [ilspy-vscode](https://marketplace.visualstudio.com/items?itemName=icsharpcode.ilspy-vscode) has more features than AvaloniaILSpy ever had and
+is available on all platforms thanks to VS Code. See [feature comparison](https://github.com/icsharpcode/ilspy-vscode/wiki/Feature-Comparison) for what is 
+not there compared to the WPF/Windows version of ILSpy. All future xplat work is focused on the VS Code extension.
+
+We do not intend to resurrect a "copy of ILSpy with UI framework XYZ" as this project has proven how hard it is to keep a copy up to date.
+
+
 # AvaloniaILSpy ![Build AvaloniaILSpy](https://github.com/icsharpcode/AvaloniaILSpy/workflows/Build%20AvaloniaILSpy/badge.svg?branch=master)
 
 This is cross-platform version of [ILSpy](https://github.com/icsharpcode/ILSpy) built with [Avalonia](https://github.com/AvaloniaUI/Avalonia).