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();
}