RSACryptoServiceProvider 使用证书私钥解密异常：不正确的项

 1             X509Certificate2 myX509 = new X509Certificate2(@"d:\Test.pfx",

 2                 "Test@2013");

 3 

 4             RSACryptoServiceProvider pubRSA = myX509.PublicKey.Key as RSACryptoServiceProvider;

 5             RSACryptoServiceProvider priRSA = myX509.PrivateKey as RSACryptoServiceProvider;

 6 

 7             byte[] source = Encoding.Unicode.GetBytes(Console.ReadLine());

 8             byte[] encrypt = null;

 9             byte[] decrypt = null;

10             encrypt = pubRSA.Encrypt(source, false);

11             Console.WriteLine("Encrypt:{0}", Encoding.Unicode.GetString(encrypt, 0, encrypt.Length));

12             decrypt = priRSA.Decrypt(encrypt, false);

13             Console.WriteLine("Decrypt:{0}", Encoding.Unicode.GetString(decrypt, 0, decrypt.Length)); 

异常提示：

执行到第12行时：解密时抛出异常
未处理 System.Security.Cryptography.CryptographicException
  Message=不正确的项。

  Source=mscorlib
  StackTrace:
       在 System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
       在 System.Security.Cryptography.Utils._DecryptKey(SafeKeyHandle hPubKey, Byte[] key, Int32 dwFlags)
       在 System.Security.Cryptography.RSACryptoServiceProvider.Decrypt(Byte[] rgb, Boolean fOAEP)
       在 Test.Program.Main(String[] args) 位置 F:\VS2010\GobalTestProject\Test\Program.cs:行号 385
       在 System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       在 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       在 System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       在 System.Threading.ThreadHelper.ThreadStart()
  InnerException:

 

请高人指点，私钥解密失败，感激。

RSA  私钥解密 不正确的项 --------------------编程问答-------------------- 同求。。。。。。。

补充：.NET技术 ,  C#