Check if List already contains an item or not?

Question

I used struct

public struct stuff
{
    public int ID;
    public int quan;
}

in List<stuff> stuff = new List<stuff>();

How can I check the list, is there already a material "where ID = 1"?

Answer 1

You can easily use LINQ

bool res = stuff.Any(c => c.ID == 1);

Answer 2

bool isContains = stuff.Any(x => x.ID == 1);

Answer 3

if(stuf.Select(x => x.id).Contains(1))
{
    //Do Stuff
}