خطا

[ali2575]

using System;

using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace AndroidApplication4
{
[Activity(Label = "AndroidApplication4", MainLauncher = true, Icon = "@drawable/icon")]
public class Activity1 : Activity
{
override void OnCreate(Bundle bundle)
{

base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
TextView txtview1 = FindViewById<TextView>(Resource.Id.txtview1);
TextView txtview2 = FindViewById<TextView>(Resource.Id.txtview2);
EditText edittxt1 = FindViewById<EditText>(Resource.Id.edittxt1);
EditText edittxt2 = FindViewById<EditText>(Resource.Id.edittxt2);
Button btnja = FindViewById<Button>(Resource.Id.btnjm);
Button btnta = FindViewById<Button>(Resource.Id.btnta);
Button btntagh = FindViewById<Button>(Resource.Id.btntagh);
Button btnza = FindViewById<Button>(Resource.Id.btnza);
TextView txtview3 = FindViewById<TextView>(Resource.Id.txtview3);

btnja.Click += btnja_Click;
}


void btnja_Click(object sender, EventArgs e)
{
if (checktext())
{
int i = Convert.ToInt32(edittxt1);
int j = Convert.ToInt32(edittxt2);
int p = i + j;
txtview3.Text = Convert.ToString(p);

}
}
bool checktext()
{
if (edittxt1.Text == "")
{
Toast.MakeText(this, "عدد اول را وارد کنید", ToastLength.Long).Show();

return false;
}
else if (edittxt2.Text == "")
{
Toast.MakeText(this, "عدد دوم را وارد کنید", ToastLength.Long).Show();
return false;
}
else
{
return true;
}
}
}
}




چرا خطای 'AndroidApplication4.Activity1.OnCreate(Android.OS .Bundle)': virtual or abstract members cannot be private
میده؟

[ali2575]

چرا خطای 'AndroidApplication4.Activity1.OnCreate(Android.OS .Bundle)': virtual or abstract members cannot be private
میده؟