Csharp/CSharp Tutorial/I18N Internationalization/Encoding Based64

Base64 encode a Unicode string as a string

using System;
using System.IO;
using System.Text;
class MainClass
{
    public static void Main() 
    {
        byte[] b = Encoding.Unicode.GetBytes("string");
        // Return the Base64-encoded string.
        string str =  Convert.ToBase64String(b);
        Console.WriteLine(str);
        Convert.FromBase64String(str);
        // Return the decoded Unicode string.
        Console.WriteLine(Encoding.Unicode.GetString(b));

    }
}

cwB0AHIAaQBuAGcA
string

Decode a Base64-encoded Unicode string from a string

using System;
using System.IO;
using System.Text;
class MainClass
{
    public static void Main() 
    {
        byte[] b = Encoding.Unicode.GetBytes("string");
        // Return the Base64-encoded string.
        string str =  Convert.ToBase64String(b);
        Console.WriteLine(str);
        Convert.FromBase64String(str);
        // Return the decoded Unicode string.
        Console.WriteLine(Encoding.Unicode.GetString(b));

    }
}

cwB0AHIAaQBuAGcA
string

Decode the Base64-encoded int to a byte array

using System;
using System.IO;
using System.Text;
class MainClass
{
    public static void Main() 
    {
        // Get a byte representation of the int.
        byte[] b = BitConverter.GetBytes(123);
        // Return the Base64-encoded int.
        string str =  Convert.ToBase64String(b);
        Console.WriteLine(str);
        
        b = Convert.FromBase64String(str);
        // Return the decoded int.
        int i =  BitConverter.ToInt32(b,0);
        
        Console.WriteLine(i);
        
    }
}

ewAAAA==
123

Encode int to the Base64-encoded byte array

using System;
using System.IO;
using System.Text;
class MainClass
{
    public static void Main() 
    {
        // Get a byte representation of the int.
        byte[] b = BitConverter.GetBytes(123);
        // Return the Base64-encoded int.
        string str =  Convert.ToBase64String(b);
        Console.WriteLine(str);
        
        b = Convert.FromBase64String(str);
        // Return the decoded int.
        int i =  BitConverter.ToInt32(b,0);
        
        Console.WriteLine(i);
    }
}

ewAAAA==
123