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=220.127.116.11, 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
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.