In C#, what's the best way to search a list of a class by one of the class's members?

Question

Say I have a class that looks something like this:

class SomeClass {
    int m_member;

    public int Member {
        get { return m_member; }
        set { m_member = value; }
    }
}

And somewhere else, I have a list of type List<SomeClass> list.

If I want to search the list for a particular instance of the class, I can just do

int index = list.IndexOf(someInstance);

But if I want to search the list by Member, I have to do this:

int index = -1;
for (int i = 0; i < list.Count; i++) {
    if (list[i].Member == someMember) {
        index = i;
        break;
    }
}

Is there a better way to do this?

Answer 1

int index = list.FindIndex(m => m.Member == someMember);

Answer 2

If you can use Linq

SomeClass aClasss = list.FirstOrDefault(item => item.Member == someMember);