List扩展WhereIF

 1 /// <summary>
 2 /// WhereIF扩展
 3 /// </summary>
 4 /// <typeparam name="TSource"></typeparam>
 5 /// <param name="source"></param>
 6 /// <param name="where"></param>
 7 /// <param name="predicate"></param>
 8 /// <returns></returns>
 9 public static IEnumerable<TSource> WhereIF<TSource>(this IEnumerable<TSource> source,bool where , Func<TSource, bool> predicate)
10 {
11 if (where)
12 return source.Where(predicate);
13 
14 return source;
15 }