Call WebApi Link to Windows form for Login Authentication

Question

using (var client = new HttpClient())

{

string data = txtPass.Text;

string password = Encrypt(data);

HttpResponseMessage response = Client.GetAsync("api/Values/Login?UserLogin = '" + txtUser.Text + "' & Password = '" + password + "'").Result;

 client.BaseAddress = new Uri("http://qaen.hr2eazy.com/MobileAPI/");

LoginClass lgn = new LoginClass { Email = txtUser.Text.ToString(), Password = txtPass.Text.ToString() };

 var response = client.PostAsJsonAsync("api/Values/Login? UserLogin = '" + txtUser.Text + "' and Password = '" + password + "'", lgn).Result;

 

var a = response.Content.ReadAsStringAsync();

if (a.Result.ToString().Trim() == "0")

{

MessageBox.Show("Invalid Username");

}

else

{

MessageBox.Show ("Login Successful");

Main f = new Main();

f.Show();

this.Hide();

}

}