How do I encode and decode a base64 string in C#?

Question

Aryan Kumar · Answer

Sure, here is how to encode and decode a base64 string in C#:
Encoding a string to base64
To encode a string to base64, you can use the Convert.ToBase64String() method. This method takes a byte array as a parameter and returns a base64 encoded string.
For example, the following code encodes the string "Hello, world!" to base64:
C#
string myString = "Hello, world!";
byte[] myBytes = Encoding.UTF8.GetBytes(myString);
string base64String = Convert.ToBase64String(myBytes);
Decoding a base64 string
To decode a base64 string, you can use the Convert.FromBase64String() method. This method takes a base64 encoded string as a parameter and returns a byte array.
For example, the following code decodes the base64 string "SGVsbG8gV29ybGQh" to the string "Hello, world!":
C#
string base64String = "SGVsbG8gV29ybGQh";
byte[] myBytes = Convert.FromBase64String(base64String);
string myString = Encoding.UTF8.GetString(myBytes);
Here is a complete example of how to encode and decode a base64 string in C#:
C#
using System;
using System.Text;
public class Base64EncodeDecode
{
    public static void Main(string[] args)
    {
        // Encode a string to base64.
        string myString = "Hello, world!";
        byte[] myBytes = Encoding.UTF8.GetBytes(myString);
        string base64String = Convert.ToBase64String(myBytes);
        // Decode a base64 string.
        string decodedString = Convert.FromBase64String(base64String);
        // Print the decoded string.
        Console.WriteLine(decodedString);
    }
}

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How do I encode and decode a base64 string in C#?

Steilla Mitchel

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