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Could not load type 'System.Data.Services.Providers.IDataServiceUpdateProvider' from assembly

In this article we will be seeing how to resolve the error "Could not load type 'System.Data.Services.Providers.IDataServiceUpdateProvider' from assembly 'System.Data.Services, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089'".


When you try to access the SharePoint list using REST API through the URL http://servername:12345/_vti_bin/listdata.svc you may be getting the following error.


The reason for the error would be you may not have installed ADO.Net Data Services in your computer server.

ADO.Net Data Services:

Note: Download the files appropriate to you or else when you try to install you would be getting the following error.

Windows 2008 R2:

For Windows 2008 R2 select the following one

Install ADO. Net Data Services:

  • Open the downloaded file.

  • Windows Update Standalone Installer wizard will pop up.

  • Click on Yes.

  • Restart your server.

  • Now try to access the list using API, you would be able to access the list successfully. 



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