This short article shows you how to resolve the error message Could not load file or assembly ‘Microsoft.ReportViewer.WebForms’.
When I was Building my existing website in Visual Studio 2015 Update 2. I received an error:
Could not load file or assembly ‘Microsoft.ReportViewer.WebForms, Version=18.104.22.168, Culture=neutral, PublicKeyToken=89845dcd8080cc91’ or one of its dependencies. The system cannot find the file specified.
You need to download this separately from the link below: