Merge pull request #87 from stripedpajamas/update-docs

Add workaround docs for C# extension woes

DOCS.md

@@ -30,6 +30,11 @@ Until something more open comes around, we use the Microsoft Marketplace/Extensi
 
 If you use the [code-settings-sync](https://github.com/shanalikhan/code-settings-sync) extension, you may have [an issue](https://github.com/VSCodium/vscodium/issues/72) installing extensions (via the plugin). Refer to [this workaround](https://github.com/shanalikhan/code-settings-sync/issues/668#issuecomment-462065341) to get it working properly.
 
+### Proprietary Debugging Tools
+The debugger provided with Microsoft's [C# extension](https://github.com/OmniSharp/omnisharp-vscode) as well as the (Windows) debugger provided with their [C++ extension](https://github.com/Microsoft/vscode-cpptools) are very restrictively licensed to only work with the offical Visual Studio Code build. See [this comment in the C# extension repo](https://github.com/OmniSharp/omnisharp-vscode/issues/2491#issuecomment-418811364) and [this comment in the C++ extension repo](https://github.com/Microsoft/vscode-cpptools/issues/21#issuecomment-248349017). 
+
+A workaround exists to get debugging working in C# projects, by using Samsung's opensource [netcoredbg](https://github.com/Samsung/netcoredbg) package. See [this comment](https://github.com/VSCodium/vscodium/issues/82#issue-409806641) for instructions on how to set that up.
+
 ## <a id="migrating"></a>Migrating from Visual Studio Code to VSCodium
 VSCodium (and a freshly cloned copy of vscode built from source) stores its extension files in `~/.vscode-oss`. So if you currently have Visual Studio Code installed, your extensions won't automatically populate. You can reinstall your extensions from the Marketplace in VSCodium, or copy the `extensions` from `~/.vscode/extensions` to `~/.vscode-oss/extensions`.