How can I group data using LINQ in C#?

How can I group data using LINQ in C#?

You can use the GroupBy method in LINQ to group data based on a specific key. For example, if you have a list of students and you want to group them by their grades, you can do it like this:

var groupedStudents = students.GroupBy(s => s.Grade);

Can you show me a complete example?

Sure! Here's a complete example:

var students = new List<Student>
{
    new Student { Name = "Alice", Grade = "A" },
    new Student { Name = "Bob", Grade = "B" },
    new Student { Name = "Charlie", Grade = "A" }
};

var groupedStudents = students.GroupBy(s => s.Grade);

foreach (var group in groupedStudents)
{
    Console.WriteLine($"Grade: {group.Key}");
    foreach (var student in group)
    {
        Console.WriteLine($" - {student.Name}");
    }
}

What if I want to order the groups?

You can use the OrderBy method after grouping. For example:

var orderedGroups = students.GroupBy(s => s.Grade)
                             .OrderBy(g => g.Key);

Thanks! This is really helpful.

You're welcome! If you have any more questions about LINQ or C#, feel free to ask!