The type 'Microsoft.Reporting.WebForms.ReportViewer'

Question

_{Thursday, July 25, 2019 12:26 PM}

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\10.0.0.0__b03f5f7f11d50a3a\Microsoft.ReportViewer.WebForms.dll

All replies (1)

_{Friday, July 26, 2019 1:31 AM}

Hi SahilBorse,

The web.config file automatically generated references for both these two dll with different versions.

Please try to remove one of them, for example,

Remove below in your web.config file:

<add namespace="Microsoft.Reporting.WebForms" assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" tagPrefix="Reporting"/>

Best Regard,

Yang Shen