Base64Encode / Base64Decode

Base64Encode

public static string Base64Encode(string data)
{
	try
	{
		byte[] encData_byte = new byte[data.Length];

		encData_byte = System.Text.Encoding.UTF8.GetBytes(data);
		string encodedData = Convert.ToBase64String(encData_byte);

		return encodedData;
	}
	catch (Exception e)
	{
		throw new Exception("Error in Base64Encode: " + e.Message);
	}
}

Base64Decode

public static string Base64Decode(string data)
{
	try
	{
		System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
		System.Text.Decoder utf8Decode = encoder.GetDecoder();
		byte[] todecode_byte = Convert.FromBase64String(data);
		int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
		char[] decoded_char = new char[charCount];
		utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
		string result = new String(decoded_char);

		return result;
	}
	catch (Exception e)
	{
		throw new Exception("Error in Base64Decode: " + e.Message);
	}
}

Test Code

string text = "Hello Ben !!!";

string encodedText = Base64Encode(text);
string decodedText = Base64Decode(encodedText);

Console.WriteLine($"encodedText : {encodedText}");
Console.WriteLine($"decodedText : {decodedText}");

Test Result

encodedText : SGVsbG8gQmVuICEhIQ==
decodedText : Hello Ben !!!