I added a request.AddParameter("application/json; charset=utf-8", JsonConvert.SerializeObject(body), ParameterType.RequestBody); or by request.AddJsonBody(body, "application/json"); to the request object They work.
How to delete this body from the request object and add a new one (or update it -if it is possible) instead of recreating the request object again and again just to change the body element. RestSharp V107+ I tried request.Parameters.RemoveParameter("body"); It did not do anything.