Update readme

Author: ejsmith

README.md

@@ -111,6 +111,24 @@ Key topics:
 - [Performance](https://mediator.foundatio.dev/guide/performance.html) - Benchmarks vs other libraries
 - [Configuration](https://mediator.foundatio.dev/guide/configuration.html) - MSBuild and runtime options
 
+## 🔍 Viewing Generated Code
+
+For debugging purposes, you can inspect the source code generated by Foundatio Mediator. Add this to your `.csproj`:
+
+```xml
+<PropertyGroup>
+    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+    <CompilerGeneratedFilesOutputPath>Generated</CompilerGeneratedFilesOutputPath>
+</PropertyGroup>
+
+<ItemGroup>
+    <Compile Remove="$(CompilerGeneratedFilesOutputPath)/**/*.cs" />
+    <Content Include="$(CompilerGeneratedFilesOutputPath)/**/*.cs" />
+</ItemGroup>
+```
+
+After building, check the `Generated` folder for handler wrappers, DI registrations, and interceptor code. See [Troubleshooting](https://mediator.foundatio.dev/guide/troubleshooting.html) for more details.
+
 ## 📦 CI Packages (Feedz)
 
 Want the latest CI build before it hits NuGet? Add the Feedz source (read‑only public) and install the pre-release version: