private void okButton_Click(object sender, EventArgs e)
{
var name = this.textBox1.Text;
StringClass stringClass = new StringClass();
MessageBox.Show(stringClass.GetWelcomeString(name));
}
private void Btn_Click(object sender, System.EventArgs e)
{
TextView tw = FindViewById <TextView>(Resource.Id.textView1);
EditText editText = FindViewById <EditText>(Resource.Id.editText1);
StringClass stringClass = new StringClass();
tw.Text = stringClass.GetWelcomeString(editText.Text);
}