If you must stay on version 9.0.0.0 for legacy compatibility, ensure you are downloading the files from the official Microsoft source to avoid tampered DLLs.

The safest way to get version 9.0.0.0 is to install the official redistributable package, which registers the assembly correctly in the Global Assembly Cache (GAC).

: You move it to a new server, and it immediately fails with the dreaded error: "Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=9.0.0.0..." .

Right-click the downloaded ReportViewer.exe and select Run as Administrator .

To help find the exact solution for your environment, please let me know: What is running the application?

To provide context on the lifecycle of this library, the version numbers evolved as follows:

These installations include ReportViewer 9.0.0.0. You can locate the DLL in the following paths:

If you are running into specific deployment roadblocks, let me know: What is hosting the application?

| Version | Released With | Key Features | |---------|--------------|--------------| | | SQL 2008 R2 / VS 2010 | Legacy RDL 2008 | | 10.0.0.0 | SQL 2012 | Enhanced charts | | 11.0.0.0 | SQL 2014 | Map controls | | 12.0.0.0 | SQL 2016 / VS 2015 | Modern browser support | | 15.0.0.0 | SQL 2019 / VS 2019 | .NET Core support |

Ensure that the ASP.NET account (e.g., IIS_IUSRS ) has read/execute permissions on the GAC assembly files.

<configuration> <system.web> <httpHandlers> <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" /> </httpHandlers> <buildProviders> <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.Common, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </buildProviders> </system.web> <system.webServer> <handlers> <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </handlers> </system.webServer> </configuration>

If you are looking for this specific version today, you’re likely living a classic developer "ghost story." Here is how the story usually goes:

It is important to understand the versioning history, as the version number on the file does not always match the package name:

. As a foundational component of the Visual Studio 2008 ecosystem, this library enables the rendering of reports designed using Microsoft’s Report Definition Language (RDL). We explore its technical dependencies, the transition from local to server-side processing, and the security considerations for modern legacy systems. 1. Introduction Microsoft.ReportViewer.Common

Microsoft.reportviewer.common Version 9.0.0.0 | [top] Download

If you must stay on version 9.0.0.0 for legacy compatibility, ensure you are downloading the files from the official Microsoft source to avoid tampered DLLs.

The safest way to get version 9.0.0.0 is to install the official redistributable package, which registers the assembly correctly in the Global Assembly Cache (GAC).

: You move it to a new server, and it immediately fails with the dreaded error: "Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=9.0.0.0..." .

Right-click the downloaded ReportViewer.exe and select Run as Administrator . microsoft.reportviewer.common version 9.0.0.0 download

To help find the exact solution for your environment, please let me know: What is running the application?

To provide context on the lifecycle of this library, the version numbers evolved as follows:

These installations include ReportViewer 9.0.0.0. You can locate the DLL in the following paths: If you must stay on version 9

If you are running into specific deployment roadblocks, let me know: What is hosting the application?

| Version | Released With | Key Features | |---------|--------------|--------------| | | SQL 2008 R2 / VS 2010 | Legacy RDL 2008 | | 10.0.0.0 | SQL 2012 | Enhanced charts | | 11.0.0.0 | SQL 2014 | Map controls | | 12.0.0.0 | SQL 2016 / VS 2015 | Modern browser support | | 15.0.0.0 | SQL 2019 / VS 2019 | .NET Core support |

Ensure that the ASP.NET account (e.g., IIS_IUSRS ) has read/execute permissions on the GAC assembly files. Right-click the downloaded ReportViewer

<configuration> <system.web> <httpHandlers> <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" /> </httpHandlers> <buildProviders> <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.Common, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </buildProviders> </system.web> <system.webServer> <handlers> <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </handlers> </system.webServer> </configuration>

If you are looking for this specific version today, you’re likely living a classic developer "ghost story." Here is how the story usually goes:

It is important to understand the versioning history, as the version number on the file does not always match the package name:

. As a foundational component of the Visual Studio 2008 ecosystem, this library enables the rendering of reports designed using Microsoft’s Report Definition Language (RDL). We explore its technical dependencies, the transition from local to server-side processing, and the security considerations for modern legacy systems. 1. Introduction Microsoft.ReportViewer.Common