The IndexOf method returns the first index of an item if found in the List.
List<string> AuthorList = new List<string>();
AuthorList.Add("Mahesh Chand");
AuthorList.Add("Praveen Kumar");
AuthorList.Add("Raj Kumar");
AuthorList.Add("Nipun Tomar");
AuthorList.Add("Mahesh Chand");
AuthorList.Add("Dinesh Beniwal");
// Contains - Check if an item is in the list
if (AuthorList.Contains("Mahesh Chand"))
{
Console.WriteLine("Author found!");
}
// Find an item and replace it with new item
int idx = AuthorList.IndexOf("Nipun Tomar");
if (idx >= 0)
{
AuthorList[idx] = "New Author";
}
Console.WriteLine("\nIndexOf ");
foreach (var author in AuthorList)
{
Console.WriteLine(author);
}