title: The type 'Microsoft.Reporting.WebForms.ReportViewer' exists in both
body: <p>I have a ASP.NET application which was referring Microsoft.ReportViewer.WebForms of version 9.0.0.0, I changed to refer to Microsoft.ReportViewer.WebForms of version 11.0.0.0. Now when I run my application on 2 of the machines I get following error</p>
  
  <p><strong>Compilation Error</strong></p>
  
  <p><strong>Description:</strong> An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. </p>
  
  <p><strong>Compiler Error Message:</strong> CS0433: The type 'Microsoft.Reporting.WebForms.ReportViewer' exists in both 'c:\Windows\assembly\GAC_MSIL\Microsoft.ReportViewer.WebForms\9.0.0.0__b03f5f7f11d50a3a\Microsoft.ReportViewer.WebForms.dll' and 'c:\Windows\assembly\GAC_MSIL\Microsoft.ReportViewer.WebForms\11.0.0.0__89845dcd8080cc91\Microsoft.ReportViewer.WebForms.DLL'</p>
  
  <p>I have ensured that everywhere in my web.config version number is updated to 11.0.0.0</p>