static void Main()
{
  string srcConnString = "Data Source=(local);Integrated Security=true;Initial Catalog=testdb";
  string desConnString = "Data Source=****.sqlserver.rds.aliyuncs.com,3433;User ID=**;Password=**;Initial Catalog=testdb";
 
  SqlConnection srcConnection = new SqlConnection();
  SqlConnection desConnection = new SqlConnection();
 
  SqlCommand sqlcmd = new SqlCommand();
  SqlDataAdapter da = new SqlDataAdapter();
  DataTable dt = new DataTable();
 
  srcConnection.ConnectionString = srcConnString;
  desConnection.ConnectionString = desConnString;
  sqlcmd.Connection = srcConnection;
 
  sqlcmd.CommandText = @"SELECT top 1000000 [PersonType],[NameStyle],[Title],[FirstName],[MiddleName],[LastName],[Suffix],[EmailPromotion]
           ,[AdditionalContactInfo],[Demographics],NULL as rowguid,[ModifiedDate] FROM [testdb].[dbo].[Person]";
  sqlcmd.CommandType = CommandType.Text;
  sqlcmd.Connection.Open();
  da.SelectCommand = sqlcmd;
  da.Fill(dt);
 
 
  using (SqlBulkCopy blkcpy = new SqlBulkCopy(desConnString, SqlBulkCopyOptions.CheckConstraints))
  //using (SqlBulkCopy blkcpy = new SqlBulkCopy(desConnString, SqlBulkCopyOptions.Default))
  {
    blkcpy.BatchSize = 2000;
    blkcpy.BulkCopyTimeout = 5000;
    blkcpy.SqlRowsCopied += new SqlRowsCopiedEventHandler(OnSqlRowsCopied);
    blkcpy.NotifyAfter = 2000;
 
    foreach (DataColumn dc in dt.Columns)
    {
      blkcpy.ColumnMappings.Add(dc.ColumnName, dc.ColumnName);
    }
 
    try
    {
      blkcpy.DestinationTableName = "Person";
      blkcpy.WriteToServer(dt);
    }
    catch (Exception ex)
    {
      Console.WriteLine(ex.Message);
    }
    finally
    {
      sqlcmd.Clone();
      srcConnection.Close();
      desConnection.Close();
 
    }
  }
 
}
 
private static void OnSqlRowsCopied(
  object sender, SqlRowsCopiedEventArgs e)
{
  Console.WriteLine("Copied {0} so far...", e.RowsCopied);
}

BULK INSERT testdb.dbo.person_in
FROM N'D:\trace\bcp.txt'
WITH
(
 CHECK_CONSTRAINTS 
);