Different Method not call webapi Project to MVC Project

This is My Webapi Controller Method

 

static readonly IRegCls RegObj = new SampleApplicationWebApi.Models.MyTest.RegCls();
public HttpResponseMessage GetFirstName(RegistrationMst ObjReg)
{
RegistrationMst Users = RegObj.GetFirstName(ObjReg);
if (Users == null)
{
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "S O R R Y");
}
else
{
return Request.CreateResponse(HttpStatusCode.OK, Users);
}
}
public HttpResponseMessage GetLastName(RegistrationMst ObjReg)
{
RegistrationMst Users = RegObj.GetLastName(ObjReg);
if (Users == null)
{
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "S O R R Y");
}
else
{
return Request.CreateResponse(HttpStatusCode.OK, Users);
}
}

 

 

How to call different Method  in my MVC Project

 

My Calling 

This MVC Controller 

[HttpPost]
public ActionResult GetFirstName(RegistrationMst RejObj)
{


var client = new HttpClient();
var response = client.PostAsJsonAsync("http://localhost:43536/api/RegAPI", RejObj).Result;

if (response.IsSuccessStatusCode)
{
}
return RedirectToAction("Index", "Home");
}
[HttpPost]
public ActionResult GetLastName(RegistrationMst RejObj)
{


var client = new HttpClient();
var response = client.PostAsJsonAsync("http://localhost:43536/api/RegAPI/GetLastName", RejObj).Result;

if (response.IsSuccessStatusCode)
{
}
return RedirectToAction("Index", "Home");
}

 

 

 

Current Issue is Method Not Fount