How to sort a List in C#

Date- Jun 01,2023

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In C#, you can use the Sort method to sort a List in ascending order. Here's an example of how you can sort a list of integers:

List<int> numbers = new List<int> { 4, 2, 7, 1, 9 };
numbers.Sort();

After executing the Sort method, the numbers list will be sorted in ascending order: { 1, 2, 4, 7, 9 }.

If you want to sort a list of objects based on a specific property, you can use the Sort method with a custom comparison. Here's an example where we sort a list of Person objects based on their Name property:

class Person
{
    public string Name { get; set; }
    // other properties
}

List<Person> people = new List<Person>
{
    new Person { Name = "Alice" },
    new Person { Name = "Charlie" },
    new Person { Name = "Bob" }
};

people.Sort((p1, p2) => p1.Name.CompareTo(p2.Name));

After executing the Sort method with the custom comparison, the people list will be sorted alphabetically by name: { "Alice", "Bob", "Charlie" }.

Alternatively, if you want to sort a list in descending order, you can use the Sort method with a custom comparison and reverse the result using the Reverse method:

List<int> numbers = new List<int> { 4, 2, 7, 1, 9 };
numbers.Sort((x, y) => y.CompareTo(x));
numbers.Reverse();

After executing these two methods, the numbers list will be sorted in descending order: { 9, 7, 4, 2, 1 }.

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