I want to protect my RSA private key with a password (who wouldn't) but the following C# fails:
SecureString pw = new SecureString();
pw.AppendChar('x');
CspParameters prms = new CspParameters();
prms.KeyPassword = pw;
RSACryptoServiceProvider crypto = new RSACryptoServiceProvider(prms);
byte[] encrypted = crypto.Encrypt(Encoding.ASCII.GetBytes("encryptme"), true);
...with the CryptographicException: "Invalid type specified". If I take the KeyPassword assignment out it works fine.
What am I, or Microsoft, doing wrong?