C# Base64 decode and encode

Here is an quick example how to encode/decode a string to base64. This example works already on .net core 2.0 or above.

There are two functions, one to encode and the another to decode a string. It uses the Convert class from System and the encoding from the encoding functions from System.Text, so don’t forget to add the usings in the top of the file.

        /// <summary>
        /// Encodes a string to base64, using default encoding.
        /// </summary>
        /// <param name="str">String to encode.</param>
        /// <returns>Encdoded string.</returns>
        public static string Base64Encode(string str)
            return Convert.ToBase64String(Encoding.Default.GetBytes(str));

        /// <summary>
        /// Decodes a string from base64, using default encoding.
        /// </summary>
        /// <param name="str">base64 encoded string.</param>
        /// <returns>Decoded string.</returns>
        public static string Base64Decode(string str)
            return Encoding.Default.GetString(Convert.FromBase64String(str));






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