Improve Contributor Guide

CONTRIBUTING.md

@@ -333,3 +333,55 @@
 [EnvironmentVariablesExtensions.cs](./src/Shared/EnvironmentVariables/EnvironmentVariablesExtensions.cs)
 for an example of a file copied from another project and attributed in the [3rd
 party notices](./THIRD-PARTY-NOTICES.TXT) file.
+
+## Troubleshooting Common Issues
+
+### 1. SDK Version Compatibility Issues
+
+**Problem:**
+
+The project requires a specific SFV version 
+but developers may download an incompatible version.
+
+**Solution:**
+
+* See [required version here](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/global.json#L4)
+* Verify your installed SDK version with:
+
+  ```sh
+  dotnet --version
+  ```
+
+If you have an incompatible SDK, download the correct version [here](https://dotnet.microsoft.com/download/dotnet/9.0).
+
+### 2. Build and Test Challenges
+
+#### Version Mismatch Between Assemblies
+
+**Issue:** CS1705 version conflict when referencing OpenTelemetry.Api package.
+
+**Fix:**
+Ensure dependencies are updated by running:
+
+  ```sh
+  dotnet restore
+  ```
+
+If the issue persists, force-reinstall dependencies:
+
+  ```sh
+  dotnet nuget locals all --clear
+  dotnet restore
+  ```
+
+#### Dynamically Referenced Packages Causing Compatibility Problems
+
+**Solution:**
+
+* Ensure your `global.json` file correctly specifies
+  the required SDK version.
+* If using multiple SDK versions, use `dotnet --list-sdks`
+  to confirm correct installation.
+* Consider using a virtual environment or containerized build system
+  to maintain a consistent development environment.
+