private static SecurityKey ReadOrCreateAesKey()
{
var filePath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData),
@"Microsoft\Crypto\Aes\MachineKeys\{0}".FmtInv(KeyContainerName));
if (File.Exists(filePath))
{
return(SecurityKey.Read(filePath));
}
else
{
var dir = Path.GetDirectoryName(filePath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
var sk = SecurityKey.Generate();
sk.Save(filePath);
return(sk);
}
}