RestSharp :

AddCookie :

request.AddCookie("__ngDebug", "false");

request.AddCookie("Steam_Language", "english");

request.AddCookie("sessionid", "123");

AddHeader :

added to the request you have generated, using request.AddHeader.

request.AddHeader("Cache-Control", "no-cache"); request.AddHeader("Content-Type","application/json");

AddUrlSegment : 

Replace a token in the request, by using request.AddUrlSegment. This will replace the matching token in the request.

request.AddUrlSegment("token", "1234");

request.AddUrlSegment("username","user");

request.AddUrlSegment("password","pwd");

AddParameter :

a new parameter will add to the request.

req.AddParameter("userLogin", _username,ParameterType.GetOrPost);

 req.AddParameter("password",_password, ParameterType.GetOrPost);

AddBody : we can add body in following ways :

1 ) Anonymous Body :
request.AddBody(new { Id = 1, Name = "Hi", Val = "123" });

2 ) Type Class Body :

public class Registration { public int Id { get; set; } public String Name { get; set; } public string Val { get; set; } }

request.AddBody(new Registration() { Id = 1, Name = "Hi", Val = "100" });


3) AddJsonBody :

 var body = new
            {
                Id = 1,
                Name = "ABC",
                Val = "123",
            };

          

  request.AddJsonBody(body);  or

 request.AddParameter("application/json; charset=utf-8", body , ParameterType.RequestBody);




4) complex object:







var user = new User
            {
                apiusername = "aaaaaa",
                apipassword = "aaaaaa",
                student_code = "asdhrthsefgserg",
                username = "asda21",
                password = "Admin@1",
                firstname = "qweqwq",
                lastname = "assaca",
                email = "as1@asda.com"
            };
            var json = JsonConvert.SerializeObject(user); //Serialize before sending 


            var client = new RestClient(
                "http://url.net/");
            var request = new RestRequest(string.Format("edupro/apis/addstd/{0}", json),Method.GET);
            IRestResponse response = client.Execute(request);
            var content = response.Content; 

Execute<>(Generic)Method:

// Execute no need to deserialize



var response = client.Execute<Registration>(request); //Registration model class
Assert.That(response.Data.Val, Is.EqualTo("123"), "not correct");

Restsharp : Deserialization

https://www.youtube.com/watch?v=fv92SjOL81s