CA2202, how to solve this case

Question

Can anybody tell me how to remove all CA2202 warnings from the following code?

public static byte[] Encrypt(string data, byte[] key, byte[] iv)
{
    us         


        

Answer 1

Well, it is accurate, the Dispose() method on these streams will be called more than once. The StreamReader class will take 'ownership' of the cryptoStream so disposing streamWriter will also dispose cryptoStream. Similarly, the CryptoStream class takes over responsibility for the memoryStream.

These are not exactly real bugs, these .NET classes are resilient to multiple Dispose() calls. But if you want to get rid of the warning then you should drop the using statement for these objects. And pain yourself a bit when reasoning what will happen if the code throws an exception. Or shut-up the warning with an attribute. Or just ignore the warning since it is silly.