RestSharp - How to validate response after sending a PATCH request if response status code is 400

[Mahathi Addanki]

Hi,

I am sending a PATCH request to an API in our system using Restsharp library. For the data under test, the API returns 400 response code with below response body

{
    "display message" : "Validation Failed"
    "Validation message": "id is required"
}

I have to validate response code and response contents. I see that the response code is received in httpresponseCode, I am not able to figure out how i can retrieve the response body contents

           try{
                RestClient client = SetUrl(endpoint);
                var token = Readtoken();
                RestRequest request = new RestRequest().AddStringBody(jsonData, DataFormat.Json).AddHeader("Authorization", "Bearer " + token);
                return await client.PatchAsync(request);             
            }
            catch (HttpRequestException ex)
            {
                var httpresponseCode = (int)ex.StatusCode;
                log.InfoFormat("entered into http exception while sending patch");
            }
        

Thanks in Advance