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

8 votes245 views3 answers
Unity create a child object
C#Unity
1 vote233 views2 answers
Structure in c sharp with example
C#
0 vote221 views1 answer
C# excel close workbook
C#
0 vote264 views1 answer
How to concatenate two arrays
C#
0 vote246 views1 answer
Resize image and add watermark c#
C#
1 vote215 views1 answer
C# max two values
C#
-1 vote225 views1 answer
How to check if a number is prime or not c#
C#
0 vote191 views1 answer
This gameobject
C#
1 vote241 views1 answer
Unity flexiable space
C#Unity
4 votes221 views2 answers
Foreach c# linq example
C#