A: Go to Control Panel > Programs and Features. Look for "Microsoft Report Viewer 2010 Redistributable". Uninstall it, then manually remove any local DLL copies from your project. Conclusion Microsoft.ReportViewer.Common version 9.0.0.0 may be old, but it remains the backbone of thousands of legacy business applications. While Microsoft has moved on to modern reporting tools like Power BI Embedded and the latest ReportViewer controls, some projects will require this specific version for years to come.

One specific version that continues to surface in legacy and enterprise maintenance projects is . Despite being released over a decade ago (originally alongside SQL Server 2008 R2 / Visual Studio 2010), this version remains critical for applications that have not been upgraded to modern reporting frameworks. This article provides a definitive resource for downloading, installing, and managing this specific assembly. What is Microsoft.ReportViewer.Common? The Microsoft.ReportViewer.Common.dll is a shared library that contains core logic, data processing engines, and localization resources used by all ReportViewer controls. It is distinct from the Microsoft.ReportViewer.WinForms.dll or Microsoft.ReportViewer.WebForms.dll , which handle UI rendering.

A: No. ASP.NET Core requires modern ReportViewer controls (version 15.0+ with Microsoft.ReportingServices.ReportViewerControl.WebForms ).

Add the following to your app.config or web.config :

<dependentAssembly> <assemblyIdentity name="Microsoft.ReportViewer.Common" publicKeyToken="89845dcd8080cc91" culture="neutral"/> <bindingRedirect oldVersion="0.0.0.0-9.0.0.0" newVersion="9.0.0.0"/> </dependentAssembly> Before committing to this legacy version, consider if you can migrate: