How do I troubleshoot ASP.NET errors?

I'm getting a 500 Internal Server Error on my ASP.NET application. What should I do?

A 500 Internal Server Error usually indicates a problem on the server side. First, check the server logs for detailed error messages.

I checked the logs, and it says 'Object reference not set to an instance of an object.' What does that mean?

That error means you're trying to use an object that hasn't been initialized. Look for any variables that might be null.

I found a variable that was null. How do I fix it?

You need to ensure that the variable is properly initialized before you use it. You can add a null check or initialize it with a default value.

Thanks! That helped a lot. What else should I look for when troubleshooting?

Other common issues include misconfigured web.config settings, missing dependencies, or issues with database connections. Always check those as well.