C# WebRequest simulation for http request

Job ID: 37029461

Budget: $30 – $250 USD

I want to call website and get data from it ,
when I try
https://reqbin.com/
or post man the request pass and I get the data but when i use c# code always get error .

I will give all data made the request pass in reqbin.com and you need to help me with c# code for 1 request