Convert.ToUInt32(Marshal.GetLastWin32Error)

Question

Hi Sir

 

I am trying to decrypt the encrypted string(.xml file)  

 

IntPtr hCryptProv;

IntPtr hKey = (IntPtr)0;

IntPtr hHash;

string encrString= GetEncryptedConnectionString();

decodedBytes = Convert.FromBase64String(encrString); 

decodedBytesLength = decodedBytes.Length;

ePasswordBytes = Encoding.UTF8.GetBytes(ePassword);

// Get a handle to the default provider.

if (!CryptAcquireContext(out hCryptProv, null, null, PROV_RSA_FULL, 0))

{

int error = Marshal.GetLastWin32Error();

uint error1 = Convert.ToUInt32(error );

if (error1 == NTE_BAD_KEYSET)

{

if (!CryptAcquireContext(out hCryptProv, null, null, PROV_RSA_FULL, 8))

if (!CryptAcquireContext(out hCryptProv, null, null, PROV_RSA_FULL, CRYPT_NEWKEYSET))

{

   messagebox.show  "CryptAcquireContext failed";

}

}

else

{

     messagebox.show "CryptAcquireContext failed";

}

}

 

In the above code error1 value is coming 1150 error code

 

So please help me why