What parameter must I Pass to c#'s RS256Algorithm method?

Question

I am learning c# and ASP.NET core 7. I am trying to create a custom JSON web token implementation and i am using the nuget package : JWT.NET

This is the code to create my token

public class JsonWebToken
{
    public string Create(Object model)
    {
        RSACryptoServiceProvider certificate = new RSACryptoServiceProvider();
          
        var token = JwtBuilder.Create()
                      .WithAlgorithm(new RS256Algorithm(certificate))
                      .AddClaim("exp", DateTimeOffset.UtcNow.AddHours(1).ToUnixTimeSeconds())
                      .AddClaim("claim1", 0)
                      .AddClaim("data", model)
                      .Encode();
        return token;
    }
}

I haven't even tested the above code because I cannot figure out what certificate is supposed to be. I know it is an object of RSACryptoServiceProvider, but I dont know how to use that method either and I can't find any docs. I have a private and public keypair in the Keys directory of my project. How can i go about using the id_rsa file to create the certificate object ?