title: Complex object sent to web api angular 4
body: <p>I'm trying to make a put request with the new HttpClient and HttpParams but it seems i can't send properly the updated object. I'm trying to put the object as a parameter like this :<a href="https://i.stack.imgur.com/vt1ee.png" rel="nofollow noreferrer">This is where i make my request</a> and this is my class : <a href="https://i.stack.imgur.com/xpv0o.png" rel="nofollow noreferrer">myclass</a> those are he request headers <a href="https://i.stack.imgur.com/BrCGS.png" rel="nofollow noreferrer">enter image description here</a> and the params section :<a href="https://i.stack.imgur.com/Go8Rh.png" rel="nofollow noreferrer">enter image description here</a> the request response throws null reference exception because it can't map them i guess ?</p>