public static void Main()
var data = @"-----BEGIN RSA PRIVATE KEY-----
DEK-Info: DES-EDE3-CBC,C783AF432D06AC09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-----END RSA PRIVATE KEY-----";
var encoded = System.Text.Encoding.UTF8.GetBytes(data);
var encodedstring = System.Convert.ToBase64String(encoded);
var decoded = System.Convert.FromBase64String(encodedstring);
var decodedstring = System.Text.Encoding.UTF8.GetString(decoded);
Console.WriteLine("Unencoded:- " + data);
Console.WriteLine("Encoded:- " + encodedstring);
Console.WriteLine("Decoded:- " + decodedstring);