EN CSharp Directive Region

Українська · Русский · English · Deutsch · Français · Italiano · Español · 繁體中文 · 日本語 · 한국어

Code folding

Handbook C# · Practical Guide

Indicates areas that the editor can collapse. Does not create a new scope and does not affect runtime behavior.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

// PROJECT-EXAMPLE
#region Report
int count = 3;
System.Console.WriteLine(count);
#endregion

Result:

3

Syntax

#region Name / #endregion

Example 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        #region Report
        int count = 3;
        Console.WriteLine(count);
        #endregion
    }
}

Example 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        Console.WriteLine(Reports.Format(5));
    }
}
public static class Reports {
#region Formatting
public static string Format(int count) => "Count=" + count;
#endregion
}

Official source: Microsoft Learn.