如何从名单使用lambda语法删除(how to remove from list using La

鉴于：

List<Name> names = new List<Name>(); //list full of names

public void RemoveName(string name) {
   List<Name> n = names.Where(x => x.UserName == name);;
   names.Remove(n);
}

什么是lambda语法来执行去除？

我怎样才能获得“成功”的指示，如果没有功能删除或不？

Answer 1:

names.RemoveAll(x => x.UserName == name);

这里注意，所有拉姆达语法确实是提供一种Predicate<T> ; lambda语法是完全无关的东西它最终与拉姆达做 。

或单个匹配（见注释）：

var found = names.Find(x => x.UserName == name);
if(found != null) names.Remove(found);

要么：

var index = names.FindIndex(x => x.UserName == name);
if(index >= 0) names.RemoveAt(index);

Answer 2:

var n = names.SingleOrDefault(x => x.UserName == name)
if(n != null && n.UserName.length > 0)
{
 names.Remove(n);
}

要么

var n= names.Where(x => x.UserName == name).First();
names.Remove(n)

文章来源: how to remove from list using Lambda syntax