WebExample 1: get both item and index in c# // add this to your namespace public static IEnumerable < (T item, int index) > WithIndex < T > (this IEnumerable < T > source) {return source. Select ((item, index) => (item, index));} //do something like this foreach (var (item, index) in collection. WithIndex ()) {DoSomething (item, index);} Example 2 ... WebThis post will discuss how to find the index of an element in a list in C#. The solution should either return the index of the first occurrence of the required element or -1 if it is not present in the list. 1. Using List.IndexOf () method

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WebOct 13, 2015 · If I understand you correctly, it sounds like you might want to take a look at Dictionaries. You can retrieve specific entries by 'key' rather than iterating through the list, so you can use the key to grab that item, and you can use TryGetValue() in instances where you aren't sure if the dictionary contains the item you are querying. WebExample 1: Getting Items from a List by Index List names = new List { "Alice", "Bob", "Charlie", "Dave" }; string secondName = names[1]; … top data streaming tools

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WebMar 7, 2024 · The IndexOf method searches for an item and returns the index of the item. If the item isn't in the list, IndexOf returns -1. Add this code to the bottom of your program: C# WebOct 2, 2014 · You can use the ElementAt extension method on the list. For example: // Get the first item from the list using System.Linq; var myList = new List { "Yes", … WebFeb 26, 2024 · How to Insert Elements at a Position in a C# List? To insert elements at your desired position in a List, you can use the following syntax: public void Insert (int index, T item); To add elements at the end, use the method List.Add () method. Method List.AddRange () adds a collection of objects to the end of a given List. picture framing edinburgh south