My first call to generic methods with Reflexion

Hello everybody,
hope your are well,

so this morning I just finished to implement my first method to call generic methods with Reflexion.
I'm still a junior C# developer so this is really cool.
(I'm almost done with my training in ASP .Net C#.)

This is a little soft in WinForms to encrypt text string with TripleDES, AESManaged and RijndaelManaged.

The generic methods to encrypt and decrypt :
And the method to call the generics methods :