Quick, secure secret storage for C# scripts.

SecretStore.cs

public class SecretStore
{
    private readonly string SecretsPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), typeof(SecretStore).FullName);

    public bool Exists(Guid key)
    {
        return File.Exists(GetPath(key));
    }

    public string Get(Guid key)
    {
        try
        {
            var bytes = File.ReadAllBytes(GetPath(key));
            bytes = ProtectedData.Unprotect(bytes, null, DataProtectionScope.CurrentUser);
            return Encoding.UTF8.GetString(bytes);
        }
        catch (DirectoryNotFoundException)
        {
            return null;
        }
        catch (FileNotFoundException)
        {
            return null;
        }
    }

    public void Set(Guid key, string secret)
    {
        var bytes = Encoding.UTF8.GetBytes(secret);
        bytes = ProtectedData.Protect(bytes, null, DataProtectionScope.CurrentUser);
        Directory.CreateDirectory(SecretsPath);
        File.WriteAllBytes(GetPath(key), bytes);
    }

    private string GetPath(Guid key)
    {
        return Path.Combine(this.SecretsPath, key.ToString());
    }
}