Temas importantes de C#

Extension Methods

Extension methods are static methods called with instance syntax.

How it works

Add discoverable operations to existing types.

The this modifier on the first parameter declares an extension target. The original string type is not modified.

Runnable C# example

Program.cs

using System;

static class StringExtensions
{
    public static string Truncate(this string value, int length)
        => value.Length <= length ? value : value[..length] + "…";
}

class Program
{
    static void Main() => Console.WriteLine("CodeUtility".Truncate(4));
}

Expected output

Code…

Practice with the debugger

Set a breakpoint on an important assignment or condition, click Debug, and inspect the local values before stepping to the next line.