I have this code to handle a key with the encryption:

                    Dim des As DESCryptoServiceProvider = New DESCryptoServiceProvider()
                    des.Key = bytesKey

It fails on the des.Key line saying that the specified key is not a valid size for this algorithm.

When I trace that, I obtain the following values:

des.LegalKeySizes.Length=1
des.KeySize=64
bytesKey.Length=64

So, if my bytesKey is 64 and the required KeySize is 64, why is it complaining?

This only does that when I work with the Des and and RC2 algorithm. I don't have any problem when working with RijnDael and TripleDes algorithm.