/// <summary>
/// 开始一个事务，默认是在关闭连接的时候，自动提交事务
/// </summary>
/// <param name="autoCommitOnDispose"></param>
/// <returns></returns>
public virtual DataContextTransaction BeginTransaction(bool autoCommitOnDispose = true)
{
var dct = new DataContextTransaction(this);
dct.BeginTransaction();
return(dct);
}
/// <summary>
/// 指定事务级别，开始一个事务
/// </summary>
/// <param name="level"></param>
/// <returns></returns>
public virtual DataContextTransaction BeginTransaction(IsolationLevel level)
{
var dct = new DataContextTransaction(this);
dct.BeginTransaction(level);
return(dct);
}