/// <summary>
/// IEnumerable转换为List'T'
/// </summary>
/// <typeparam name="T">参数</typeparam>
/// <param name="source">数据源</param>
/// <returns></returns>
public static List <T> CastToList <T>(this IEnumerable source)
{
return(new List <T>(source.Cast <T>()));
}