Stream - ToByteArray

A Stream extension method that converts the Stream to a byte array.

Try it

public static string FileName = "test.txt";

public static void Main()
{	
	SaveFile();
	
	byte[] bytes;
	
	using (StreamReader sr = File.OpenText(FileName))
	{
		// C# Extension Method: Stream - ToByteArray
		bytes = sr.BaseStream.ToByteArray();
    }
	
	var file = FileName.ToFileInfo();
		
	// C# Extension Method: FileInfo - WriteAllBytes
	file.WriteAllBytes(bytes);
	
	Console.WriteLine(file.ReadAllText());
}

private static void SaveFile()
{
	var html =
    @"<!DOCTYPE html>
<html>
<body>
<h1>This is <b>bold</b> heading</h1>
<p>This is <u>underlined</u> paragraph</p>
<h2>This is <i>italic</i> heading</h2>
</body>
</html> ";
	
	html.SaveAs(FileName);
}

View Source 
using System.IO;

public static partial class Extensions
{
    /// <summary>
    ///     A Stream extension method that converts the Stream to a byte array.
    /// </summary>
    /// <param name="this">The Stream to act on.</param>
    /// <returns>The Stream as a byte[].</returns>
    public static byte[] ToByteArray(this Stream @this)
    {
        using (var ms = new MemoryStream())
        {
            @this.CopyTo(ms);
            return ms.ToArray();
        }
    }
}