如何使用dynamic

        DataTable dt = new DataTable("TableOne");

        dt.Columns.Add("ID", typeof(int));
        dt.Columns.Add("Name", typeof(string));
        dt.Columns.Add("Age", typeof(int));

        dt.Rows.Add(1, "zyb", 24);
        dt.Rows.Add(2, "sjn", 22);
        dt.Rows.Add(3, "zybsjn", 46);

        string name = string.Empty;

        List<dynamic> dylit = new List<dynamic>();

        foreach (DataRow row in dt.Rows)
        {
            dynamic dy = new DynamicData();
            foreach (DataColumn col in dt.Columns)
            {
                dy[col.ColumnName] = row[col.ColumnName];
            }
            dylit.Add(dy);
        }

实例化dynamic前需要写一个类，该类继承自DynamicObject如下：

public class DynamicData : DynamicObject
{
    /// <summary>
    /// 内置集合参数
    /// </summary>
    private readonly Dictionary<string, object> _objEntity = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);

    /// <summary>
    /// Provides the implementation of getting a member.  Derived classes can override
    /// this method to customize behavior.  When not overridden the call site requesting the
    /// binder determines the behavior.
    /// </summary>
    /// <param name="binder">The binder provided by the call site.</param>
    /// <param name="result">The result of the get operation.</param>
    /// <returns>true if the operation is complete, false if the call site should determine behavior.</returns>
    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        //object objValue;
        //_objEntity.TryGetValue(binder.Name, out objValue);
        //result = objValue;
        _objEntity.TryGetValue(binder.Name, out result);
        return true;
    }

    /// <summary>
    /// Provides the implementation of setting a member.  Derived classes can override
    /// this method to customize behavior.  When not overridden the call site requesting the
    /// binder determines the behavior.
    /// </summary>
    /// <param name="binder">The binder provided by the call site.</param>
    /// <param name="value">The value to set.</param>
    /// <returns>true if the operation is complete, false if the call site should determine behavior.</returns>
    public override bool TrySetMember(SetMemberBinder binder, object value)
    {
        //Dictionary<string, object>总是可以设置value，不管key存不存在
        _objEntity[binder.Name] = value;
        return true;
    }

    /// <summary>
    ///  返回所有动态成员的Name的列表
    /// </summary>
    /// <returns>动态成员名称的列表</returns>
    public override IEnumerable<string> GetDynamicMemberNames()
    {
        return _objEntity.Keys;
    }

    /// <summary>
    /// 通过动态类型的成员名称获取值
    /// </summary>
    /// <param name="name">成员的名称</param>
    /// <returns>该成员的值,key不存在时返回null</returns>
    public object this[string name]
    {
        get
        {
            object value;
            _objEntity.TryGetValue(name, out value);
            return value;
        }
        set
        {
            _objEntity[name] = value;
        }
    }
}