List to DataTable. 利用反射，将任意元素类型 的 List 转为 DataTable.

Using System.Collections;

Using System.Reflection;

public static DataTable ToDataTable(IList list)        {            DataTable result = new DataTable();            if (list.Count > 0)            {                PropertyInfo[] propertys = list[0].GetType().GetProperties();                foreach (PropertyInfo pi in propertys)                 {                    result.Columns.Add(pi.Name, pi.PropertyType);                 }                for (int i = 0; i < list.Count; i++)                 {                     ArrayList tempList = new ArrayList();                     foreach (PropertyInfo pi in propertys)                     {                         object obj = pi.GetValue(list[i], null);                         tempList.Add(obj);                     }                     object[] array = tempList.ToArray();                    result.LoadDataRow(array, true);                }            }             return result;        }