Can you edit padding parameters for RSACryptoServiceProvider?

I'm writing an RSA encryption code on vb.net using the RSACryptoServiceProvider class. You get the option to use pkcs v1.5 or OAEP padding but i can't understand if it's parameters can be shown or are accessible to edit. I've seen the RSAOAEPKeyExchangeFormatter Class and RSAPKCS1KeyExchangeFormatter classes but i don't know how to use them. Is it possible to edit the parameter for the padded bytes and import padding bytes from your own random byte generator? Is there a sample code which does that, that i could view and understand the procedure? In general can the padding parameters on RSACryptoServiceProvider class be changed?