title: C# .NET Core How to debug System.IO.FileNotFoundException in System.Private.CoreLib.dll?
body: <p>When I run .NET Core Web API Application on VS 2017,<br>
  In Output's Debug panel, keep showing me Exception throw: </p>
  
  <p><code>'System.IO.FileNotFoundException' in System.Private.CoreLib.dll</code>  </p>
  
  <p>However, application runs well without stoping or malfunctioning.<br>
  I know Exception always means somthing needs to be cared.</p>
  
  <p>So, how can I search what <strong>File is Not Found</strong> when run CoreCLR? </p>
  
  <p>------------- more -------------------</p>
  
  <pre><code>'dotnet.exe' (CoreCLR: clrhost): Loaded 'C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App\2.0.0\System.Private.Xml.Linq.dll'. Symbols loaded.
  'dotnet.exe' (CoreCLR: clrhost): Loaded 'C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App\2.0.0\System.Private.Xml.dll'. Symbols loaded.
  'dotnet.exe' (CoreCLR: clrhost): Loaded 'C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App\2.0.0\System.Resources.ResourceManager.dll'. Symbols loaded.
  Exception thrown: 'System.IO.FileNotFoundException' in System.Private.CoreLib.dll
  Exception thrown: 'System.IO.FileNotFoundException' in System.Private.CoreLib.dll
  </code></pre>