decode base64 does not give a correct original GUID-CodePudding

I have a string GUID I need to decrease its length from 36 to max 30,the problem is I need to parse to to GUID first :

var messageID = Guid.Parse("95ec6174-1d10-4348-a126-faeeb3a026dc");

it gives me a correct GUID but when I convert to base 64 and short it,Im getting a short string out of it but when i decoce that string it give me something weird!

var shortedGuid= System.Convert.ToBase64String(messageID.ToByteArray());

the result from above line is:

dGHslRAdSEOhJvrus6Am3A==

when i decode it I get :

taHC&&

any help will be appreacited

CodePudding user response：

You must be doing something wrong then converting from the base64 string. Use Convert.FromBase64String() to convert from string to byte array, then pass the byte array to the Guid constructor:

Guid originalGuid = Guid.Parse("95ec6174-1d10-4348-a126-faeeb3a026dc");
string base64 = Convert.ToBase64String(originalGuid.ToByteArray());
byte[] decoded = Convert.FromBase64String(base64);

// Pass the byte[] to Guid constructor.
// The result is a Guid = 95ec6174-1d10-4348-a126-faeeb3a026dc
Guid decodedGuid = new Guid(decoded);