Mono Wasm Debugger

Native debugging

It's possible to debug native code and managed code using the BrowserDebugProxy project.

Steps:

Install C/C++ DevTools Support (DWARF) extension on chrome.
Enable DWARF support: Open DevTools, click on the settings, click on experiments and enable WebAssembly Debugging: Enable DWARF support.
Start the WebAssembly App Without Debugging from VS, or dotnet run on command line.
Run chrome using this startup parameter: --remote-debugging-port=9222
Go to your Blazor App Page
Press Ctrl-Alt-D (windows) it will open the debugger page
It will show something like this in the Address Bar: http://localhost:9222/devtools/inspector.html?ws=127.0.0.1:9300/devtools/page/97FCDA5A332CA3B72031790B26A264EF
Open another tab and go to chrome://inspect
Click on configure and add the port that was showed in the Address Bar: 127.0.0.1:9300
After some seconds the tabs available to debug will appear
Choose the WebAssembly Page and click on Inspect
Open the Sources tab and click on file://
You will see c# files and c files available to add breakpoints.