从数据表模式获取列描述

Question

我想知道专栏的细节.我是从微软的网站上学到的.但我仍然不知道如何获得专栏的描述.下面我从Microsoft支持站点获得了代码块.

OleDbConnection cn = new OleDbConnection();
OleDbCommand cmd = new OleDbCommand();
DataTable schemaTable; 
OleDbDataReader myReader; 

cn.ConnectionString = "Provider=SQLOLEDB;Data Source=server;User ID=login;
                       Password=password;Initial Catalog=Northwind";
cn.Open();
cmd.Connection = cn;
cmd.CommandText = "SELECT * FROM Employees";
myReader = cmd.ExecuteReader(CommandBehavior.KeyInfo); 
schemaTable = myReader.GetSchemaTable();
foreach (DataRow myField in schemaTable.Rows){
    foreach (DataColumn myProperty in schemaTable.Columns) {
    Console.WriteLine(myProperty.ColumnName + " = " + myField[myProperty].ToString());
    }
    Console.WriteLine();
    Console.ReadLine();
}
myReader.Close();
cn.Close();

请帮助我,在这个代码块中,我如何获得列的描述？