/// <summary>
/// Start a new transaction
/// </summary>
/// <param name="dbh">The Db instance to use</param>
public static void Transaction(Database dbh)
{
if (dbh.DbTransaction != null)
{
throw new Exception("Already in a transaction. Please close the exisiting transaction first");
}
var conn = dbh.Conn();
dbh.DbTransaction = conn.BeginTransaction();
}
