Using statement

The using statement is used to ensure that objects that use unmanaged resources (IDisposable objects) are disposed of properly. This is particularly important for resources such as files, database connections, and streams, which should be released when they are no longer needed to avoid resource leaks.

Example:

using System;
using System.IO;

class Program
{
    static void Main()
    {
        // Using statement to ensure the StreamReader is disposed of properly
        using (StreamReader reader = new StreamReader("example.txt"))
        {
            string content = reader.ReadToEnd();
            Console.WriteLine(content);
        } // reader.Dispose() is called automatically here
    }
}

In this example, the using statement ensures that the StreamReader object is disposed of once the block of code is done executing. This calls the Dispose method on the StreamReader object automatically.