void TableCreate(object sender, EventArgs e)
 {
     DBRepository dbr = new DBRepository();
        var result = dbr.CreateTable();
        Toast.MakeText(this, result, ToastLength.Short).Show();
 }
 void OncreateClicked(object sender,EventArgs e)
 {
     DBRepository dbr = new DBRepository();
     var result = dbr.CreateDb();
     Toast.MakeText(this,result, ToastLength.Short).Show();
 }