SharePoint CSOM ExecuteQuery throwing method missing exception

Question

I have a class library project in .net framework which retrieve the list from the SharePoint using CSOM. Below is the code for it

using (Microsoft.SharePoint.Client.ClientContext spClientContext = new Microsoft.SharePoint.Client.ClientContext("url"))
{
spClientContext.Credentials = new NetworkCredential("Username", "password");
Web SpWeb = spClientContext.Web;
spClientContext.Load(SpWeb);
spClientContext.ExecuteQuery();
}

This code works fine when called from .net framework console application. I am trying to call this class library from the asp.net core web application. When its called, below exception is thrown in the ExecuteQuery

Method not found: 'Void System.Xml.XmlSecureResolver..ctor(System.Xml.XmlResolver, System.Security.PermissionSet)'

Any thoughts will be useful

Answer 1

The .netstandard version (used by core) of CSOM does not support on-premise sharepoint and standard security. It only supports azure authentication.

using-csom-for-dotnet-standard

Answer 2

core can only call .net standard, not 4.* projects. you can not trick it by having an intermediate library call a 4.8 library.

as the .net standard version of CSOM does not support on-premise, If you need to access an on-premise sharepoint with .net core you must use the v1 REST api:

get-to-know-the-sharepoint-rest-service

Answer 3

Hi @Vaishali S ,

SharePoint On-Premises CSOM does not support .net core. Only .NET Framework is supported.

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