Obsolete warnings

Question

Hi,

I got warnings below:

warning SYSLIB0021: 'MD5CryptoServiceProvider' is obsolete: 'Derived cryptographic types are obsolete. Use the Create method on the base type instead.'
warning SYSLIB0021: 'TripleDESCryptoServiceProvider' is obsolete: 'Derived cryptographic types are obsolete. Use the Create method on the base type instead.'
warning SYSLIB0023: 'RNGCryptoServiceProvider' is obsolete: 'RNGCryptoServiceProvider is obsolete. To generate a random number, use one of the RandomNumberGenerator static

those for my codes below:

MD5 md5 = new MD5CryptoServiceProvider();
TripleDES des = new TripleDESCryptoServiceProvider();
using RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();

How to deal with them? or is it safe to ignore it?

Answer 1

According to the error message, you could find it said the 'MD5CryptoServiceProvider' is obsolete, so you should use the new method create to do it.

More details, you could refer to below codes:

var test = MD5.Create();  
var test 2 = TripleDES.Create();  

More details, you could refer to this article.