get both item and index in c# code example

Example 1: c# get index of item in list

Array.IndexOf(arrName, searchingFor)

Example 2: get both item and index in c#

// add this to your namespace
public static IEnumerable<(T item, int index)> WithIndex(this IEnumerable source)
{
    return source.Select((item, index) => (item, index));
}

//do something like this

foreach (var (item, index) in collection.WithIndex())
{
    DoSomething(item, index);
}