如何从x509 v.3证书中获取私钥并将其存储在RSACryptoServiceProvider类中？
RSACryptoServiceProvider rsaCsp = (RSACryptoServiceProvider)x509certificateobject.PrivateKey;
假设您使用公钥，那么只需将.PrivateKey更改为.PublicKey。
RSACryptoServiceProvider rsaCsp = (RSACryptoServiceProvider)x509certificateobject.PrivateKey;