This happens on the MainActivity when i call a button click event.

public class MainActivity : AppCompatActivity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.activity_main);

        Button btnLogin = this.FindViewById<Button>(Resource.Id.btnGotoLogin);
        btnLogin.Click += (object sender, EventArgs e) =>
        {
            Intent intent = new Intent(this, typeof(LoginActivity));
            StartActivity(intent);
        };

        Button btnRegister = this.FindViewById<Button>(Resource.Id.btnGotoReg2);
        btnRegister.Click += (object sender, EventArgs e) =>
        {
            Intent intent = new Intent(this, typeof(RegisterActivity));
            StartActivity(intent);
        };
    }
}