/C#/If vlaue exists don't enter event c#

If vlaue exists don't enter event c#

public bool rebateslip(int ticketID)
{
    SqlCommand myCommand  = new SqlCommand("SELECT ID FROM ticket WHERE ID = @ticketID", con);
    SqlDataAdapter sqlDa = new SqlDataAdapter(myCommand);

    myCommand.Parameters.AddWithValue("@ticketID", ticketID);
    var reader = myCommand.Execute();
    return reader.HasRows;    
}

Source: stackoverflow.com

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