Post Form Data using RestSharp

I am trying to emulate the following curl command in c# using RestSharp:

curl URL -F "login=samplelogin" -F "key=password"

I am using the following c# code to format the request:

        // Configure Request
        RestRequest request = new RestRequest(resource, Method.POST);
        
        request.AddParameter("login", context.Control.CourtLogin, ParameterType.RequestBody);
        request.AddParameter("Key", context.Control.CourtPassword, ParameterType.RequestBody); 

        request.AddHeader("Content-Type", "multipart/form-data");

The client endpoint just returns login failure. When I read the documentation for AddParameter on the RestRequest class. It states you can only have key value pair with parameter type = RequestBody.
Does anyone have any ideas on how to get multiple form data key value pairs in a RestSharp client request? Or how to duplicate multiple -F curl options using RestSharp?

Thanks in advance!