C# lambda表达式应用如何找出元素在list中的索引

private bool check(string str){ return str.EndsWith("xxx");}

Predicate<string> predicate=new Predicate<string>(check));

private void OpenMenu(GameObject gob){ Predicate<string> predicate=new Predicate<string>(s =>s.StartsWith(gob.name) ); int i=_nameList.FindIndex(predicate);}

Predicate<string> predicate = s => s.StartsWith(gob.name);

int index=_nameList.FindIndex(s => s.StartsWith(gob.name));