C# does value exist in list

public int GetItemFromList() {
	List<Item> list = new List<Item>(
      new Item(1),
      new Item(2),
      new Item(3)
    );

	Item testItem = new Item(1);

	// Inside FindIndex() you can specify a lambda expression where you
	// query if an item exists like a boolean test.
	int index = list.FindIndex(item => testItem.Id == item.Id);

	// in this case out testItem.Id (1) is equal to an item in the list
	if (index > -1)
	{
		// We get here with the index 0!
      	return index;
	}
}

public class Item
{
	public int Id { get; set; }
	public Item() { }
	public Item(int id)
	{
		Id = id;
	}
}

Similar codes

0 vote186 views1 answer
Fix autofill issue asp.net mvc
C#
0 vote176 views1 answer
Autho close in persian time picker
C#
1 vote193 views2 answers
C# create a json object inline
C#
4 votes172 views1 answer
C# string newline
C#
28 votes227 views3 answers
Delay in unity
C#Unity
1 vote144 views1 answer
Unity closest point to line
C#
0 vote179 views1 answer
List clone - C#
C#
0 vote143 views1 answer
All functions unity
C#
53 votes173 views6 answers
Print in c#
C#
0 vote244 views1 answer
C# using rename class
C#