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Could not load file or assembly 'Microsoft.ReportViewer.Common

You may come across the above error while configuring and deploying SQL Server Reporting Services. Complete error will look like

Error: Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified

Problem: You are missing the installation and configuration info for ReportViewer

Solution: Check the following things

1. Have you installed the Report Viewer? If not you need to download and install it from Microsoft using this link
2. Reboot the Machine on which you installed the Report Viewer

3. Make sure that following configuration is added in your web.config file

      <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" />