I have the following code to connect to SharePoint using clientID and ClientSecret:

string siteUrl = "https://****l.sharepoint.com/sites/DocumentApprovalProcess/";
string clientId = "***";
string clientSecret = "**";

using (var context = new AuthenticationManager().GetAppOnlyAuthenticatedContext(siteUrl, clientId, clientSecret))

But I am getting this error:

'AuthenticationManager' does not contain a constructor that takes 0 arguments

  • 1
    Which version of SharePoint and CSOM are you using? Sep 25, 2020 at 4:10
  • @GaneshSanap i am using sharepoint online and CSOM version
    – John John
    Sep 25, 2020 at 8:59

1 Answer 1


The method is in OfficeDevPnP.Core. You need to install OfficeDevPnP.Core.

Reference: https://docs.microsoft.com/en-us/dotnet/api/officedevpnp.core.authenticationmanager.getapponlyauthenticatedcontext



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