title: Diagnose issues in .NET code deployed to a production environment, C# .NET
body: <p>I want to find out what methods or tools in general can be used diagnose issues in .NET code deployed to a production environment. </p>
  
  <p>Thanks!</p>
  
  <p><strong>Update</strong></p>
  
  <p>The types of application on live: Web application, WCF application.</p>