Learn C# & .NET

What you will practise

Discover C# and .NET foundations. Use types, collections and classes to organise programs, then practise LINQ queries.

• Use types and control flow.
• Model data with classes.
• Filter and transform collections with LINQ.

Before you start: Start with language basics before moving to object-oriented programming.

A first example to understand

using System;
class Program {
    static void Main() {
        int[] values = { 2, 4, 6 };
        int total = 0;
        foreach (int value in values) total += value;
        Console.WriteLine(total);
    }
}

foreach visits each integer in the array. The sum is stored in total and printed with Console.WriteLine.

Try it: Add a condition to sum only values greater than 3.

Understand a specific concept

• Mastering LINQ Queries in C# .NET (Where, Select, OrderBy)