Convert response from rest WCF service to class object in ASP.Net using C# and VB.Net

I have rest WCF service link and i create integration with it and made the call but i want to cast the response of the call to class object using c#

This response in JSON 

{
    "Response": {
        "Code":-27,
        "ErrorMessage":"Please call login first.",
        "IsSuccess":false,"SuccessMessage":""
    },
    "AllBlocked":false,
    "Consents":null,
    "Total":0
}

public class GetConsentResponse
{
    public int Total { get; set; }
    public bool AllBlocked { get; set; }
    public List<Consent> Consents { get; set; }
}
 
public class Consent
{
     public string ConsentID { get; set; }
     public bool Blocked { get; set; }
     public string Type { get; set; }
}

HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(new Uri(serviceUri));
httpRequest.Accept = "application/json";
httpRequest.ContentType = "application/json";
httpRequest.Method = "GET";
using (HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse())
{
    using (Stream stream = httpResponse.GetResponseStream())
    {
        GetConsentResponse response = new GetConsentResponse();
        richTextBox1.Text = (new StreamReader(stream)).ReadToEnd();
    }
}