protected T QuerySingleOrDefault <T>(string sql, object parameters = null)
{
using (IDbConnection connection = new Npgsql.NpgsqlConnection(this.connectionString))
{
try
{
connection.Open();
return(connection.QuerySingleOrDefault <T>(sql, parameters));
}
catch (Exception exc)
{
Console.WriteLine(exc);
throw exc;
}
}
}