public class IRepository:DbContext
{
    public IRepository():base("db")
    {
    }
}

public class IRepository : DbContext
{
    public IRepository()
    {
    }

    protected override void OnConfiguration(DbConnectionFactory factory)
    {
        base.OnConfiguration(factory);
        string providerName= "MySql.Data.MySqlClient";
        string connectionString= "Data Source=127.0.0.1;Initial Catalog=user;User Id=root;Password=root;Charset=utf8;";
        factory.Use(providerName, connectionString);
    }
}

public class TestRepository : IRepository
{
	public bool Connected()
	{
		try
		{
			object obj = ExecuteScalar("SELECT CONVERT(varchar(50), GETDATE(), 25);", null, null, CommandType.Text);

			if (obj == null)
			{
				return false;
			}

			string dt = obj.ToString();

			DateTime _dt;

			return DateTime.TryParse(dt, out _dt);
		}
		catch (Exception ex)
		{
			throw ex;
		}
	}
}

public class TestRepository : IRepository
{
	public bool ExecuteWithTran()
    {
        string sql = null;
        object param = null;

        // begin tran
        BeginTransaction();

        // execute sql
        Execute(sql, param);
            
        // commit tran
        Commit();

        // or
        // callback tran
        //Callback();
    }
}