Microsoft.reportviewer.common Version 9.0.0.0 Download [updated] May 2026

In the world of .NET development, Microsoft.ReportViewer.Common version 9.0.0.0 is a legendary artifact from the late 2000s. It was the core engine for Visual Studio 2008 and SQL Server 2008 reporting, serving as the bridge that allowed developers to embed rich, interactive reports directly into Windows and Web applications. The Context: 2008 and the "Local Mode" Revolution

Before this version became a legacy headache, it was a breakthrough. Version 9.0 was the first to truly stabilize "Local Mode" (.rdlc files), which allowed reports to run entirely on the client’s machine without needing a full SQL Server Reporting Services (SSRS) instance. The "DLL Hell" Story

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:

The Legacy App: You inherit a mission-critical application built circa 2009.

The Crash: 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...".

The Compatibility Trap: You try to upgrade to a newer version (like 10.0 or 15.0), but the old .rdlc report definitions refuse to open or break because version 9.0 used a specific XML schema that newer viewers often try to "auto-upgrade"—sometimes irreversibly. Official Download & Recovery

To fix this, you must install the Report Viewer Redistributable 2008 Service Pack 1. Microsoft still hosts the official installer, though it is now considered legacy software.

Official Installer: Download the Report Viewer Redistributable 2008 SP1 from the Microsoft Download Center.

Alternative (NuGet): For modern environments, you can sometimes find these older runtimes packaged on NuGet as Microsoft.ReportViewer.Runtime.Common, specifically version 9.0.21022.8. Pro-Tips for Modern Systems

The Role of Microsoft.ReportViewer.Common (v9.0.0.0) in Legacy Applications microsoft.reportviewer.common version 9.0.0.0 download

The Microsoft.ReportViewer.Common assembly, specifically version 9.0.0.0, is a foundational component of the Microsoft Report Viewer 2008 redistributable package. While modern development has shifted toward newer versions and web-based reporting services, version 9.0.0.0 remains a critical dependency for maintaining and running legacy .NET applications. Functional Purpose

The "Common" DLL serves as the engine for the Report Viewer control. While Microsoft.ReportViewer.WinForms or WebForms handles the user interface elements, the Common assembly manages the heavy lifting: processing Report Definition Language (RDL) files, rendering data into various formats (like PDF or Excel), and handling the internal logic of the report's layout. Why the Specific Version Matters

In the ecosystem of .NET development, versioning is strict. Many applications built during the late 2000s were compiled specifically against the Visual Studio 2008 runtime. If a system lacks version 9.0.0.0, these applications will trigger the "Could not load file or assembly" error, even if a newer version (like v10 or v12) is installed. This makes the 9.0.0.0 download essential for "black box" legacy software that cannot be easily recompiled. Deployment and Availability

Historically, this assembly was obtained by installing the Microsoft Report Viewer 2008 Redistributable Package. Because version 9.0.0.0 predates the ubiquity of NuGet package management, it is often manually bundled into the application's bin folder or installed into the Global Assembly Cache (GAC) of the host server. Conclusion

While version 9.0.0.0 is technically "end-of-life" in terms of active feature development, its presence is a requirement for the continued operation of older enterprise systems. For developers, sourcing this specific version is less about modernizing and more about ensuring the stability and continuity of established business tools.

Microsoft.ReportViewer.Common version 9.0.0.0 is the core assembly for the Microsoft Report Viewer 2008 Redistributable, used to render reports designed with SQL Server 2008 technology within .NET applications.

Because this version is legacy, finding a standalone "DLL-only" download from official sources is difficult; it is typically bundled within the full 2008 runtime package or available via NuGet for modern projects. How to Obtain Version 9.0.0.0

Official Redistributable Package: The most reliable way to get this specific assembly is by installing the Microsoft Report Viewer 2008 SP1 Redistributable. This package installs the necessary DLLs to the Global Assembly Cache (GAC).

NuGet Package Manager: For modern development in Visual Studio, it is recommended to use the official Microsoft.ReportingServices.ReportViewerControl.WinForms or WebForms packages. While these are typically newer versions (like v15), they are the supported path for current applications. In the world of

Visual Studio Installation: If you are using an older version of Visual Studio (2008 or 2010), this component was often included in the "Data" workload or can be added via the Visual Studio Marketplace. Troubleshooting "Missing Assembly" Errors

If your application is throwing an error that it cannot find Microsoft.ReportViewer.Common, Version=9.0.0.0, follow these steps:

Check the GAC: Verify if the assembly is installed in C:\Windows\assembly.

Verify Prerequisites: Version 9.0.0.0 requires the .NET Framework 3.5. Ensure this feature is enabled in your Windows "Turn Windows features on or off" settings.

Binding Redirects: If you have a newer version installed (like v10 or v12), you can sometimes force the application to use the newer version by adding a in your app.config or web.config file.

Copy Local: If you have the DLL from another project, set the Copy Local property to True in your project references to ensure it is included in your build folder. Modern Alternatives

Microsoft has largely moved away from the 2008/2010 runtimes. For new projects, the Report Viewer 2015 Runtime is the last major "classic" redistributable, which you can find on the Microsoft Download Center.

Troubleshooting and Downloading Microsoft.ReportViewer.Common Version 9.0.0.0

If you are maintaining a legacy .NET application, you have likely encountered the infamous error: Step-by-Step Installation Guide Once you have obtained the

"Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=9.0.0.0'." This specific assembly is a core component of the Report Viewer 2008

runtime, which allows applications to render and display reports designed with Microsoft reporting technology

Whether you're setting up a new development environment or deploying to a production server, here is how to find and install this specific version. Where to Download Version 9.0.0.0 Version 9.0.0.0 is specifically tied to Report Viewer 2008 Service Pack 1

. Because this is a legacy version, finding the direct standalone installer can sometimes be tricky on modern Microsoft pages. Official Redistributable : You can download the Report Viewer Redistributable 2008 Service Pack 1 directly from the Microsoft Download Center NuGet (For Developers) : If you need the DLLs for a project, the Microsoft.ReportViewer.Runtime.Common 9.0.21022.8 package is available via NuGet

. Using NuGet is often easier than manual installation as it manages the dependencies for you. Why Version 9.0.0.0? This version was released alongside Visual Studio 2008

. While newer versions like 2012 (v11.0) and 2015 (v12.0) are available, applications built specifically for the .NET Framework 3.5 often require the 9.0.0.0 assembly to remain compatible with older report definitions Common Fixes for Deployment Issues

If you have installed the runtime but still see "Assembly Not Found" errors, try these community-proven steps: Microsoft Report Viewer 2015 Runtime

Step-by-Step Installation Guide

Once you have obtained the official redistributable, follow these steps carefully.

Common Errors and Fixes

Step 2: Download the Redistributable

  1. Navigate to the Microsoft Download Center (search for "Microsoft Report Viewer 2010 Redistributable").
  2. Download the appropriate file:
    • ReportViewer.exe (x86/x64 combined)
    • ReportViewer.msi (for silent network deployments)

Key Features and Capabilities

  • Local Processing Mode: Allows applications to process reports locally on the client machine without requiring a connection to an SSRS Report Server. This is useful for disconnected scenarios or applications using local data sources.
  • Remote Processing Mode: Connects to a SQL Server Reporting Services report server to view and render reports.
  • Export Functionality: Provides built-in support for exporting reports to various formats, including PDF, Excel (XLS), TIFF, and Word (DOC).
  • Print Control: Manages the client-side printing logic, handling printer settings, page setup, and print preview rendering.

Error 2: Mixed-mode assembly is built against version 'v2.0.50727'

Full error: Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration.

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

<startup useLegacyV2RuntimeActivationPolicy="true">
  <supportedRuntime version="v4.0" />
</startup>

Steps to Manually Add Reference

If you need to manually add a reference:

  1. Open your project in Visual Studio.
  2. Right-click on your project in the Solution Explorer, then select Add > Reference.
  3. Browse for the DLL. The typical location for Microsoft.ReportViewer.Common.dll version 9.0.0.0 on a machine with Visual Studio 2010 installed is:
    • C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies
    • C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.ReportViewer.Common\v4.0_9.0.0.0__b03f5f7f11d50a3a