options.OutputName = Path.Combine(@"D:\mip\testfiles\compound\output\", Path.GetFileName(item.Key));

C:\DEV\SOLUTION\TEMP\MipSdk-Dotnet-File-Quickstart-17a8a8fad4bf34d8cdac37c4dff130f603f58c7a\mip-sdk-dotnet-quickstart\TEMP\mipsdk-compoundfileprotection-9caa2757495331da6e723a8c5c1c0d9290236b4f
private readonly IConfidentialClientApplication _app;

ConfidentialClientApplicationOptions options = new ConfidentialClientApplicationOptions()
{
    ClientSecret = config.AppSecret,
    ClientId = clientId,
    TenantId = tenantId,
    RedirectUri = redirectUri,
    Instance = "https://login.microsoftonline.com/"
};

_app = ConfidentialClientApplicationBuilder
                .CreateWithApplicationOptions(options)
                .WithRedirectUri(redirectUri)
                .Build();   


engine = CreateFileEngine(new Identity("MyService"));
 private IFileEngine CreateFileEngine(Identity identity)
{

    // If the profile hasn't been created, do that first. 
    if (profile == null)
    {
        profile = CreateFileProfile(appInfo);
    }

    // Create file settings object. Passing in empty string for the first parameter, engine ID, will cause the SDK to generate a GUID.
    // Locale settings are supported and should be provided based on the machine locale, particular for client applications.
    var engineSettings = new FileEngineSettings(identity.Email, authDelegate, "", "en-US")
    {
        // Provide the identity for service discovery.
        Cloud = Cloud.Commercial
    };

    // Add the IFileEngine to the profile and return.
    var engine = Task.Run(async () => await profile.AddEngineAsync(engineSettings)).Result;

    return engine;
}




///////////////////////////////////////////////////////////////////////
using (var stream = new FileStream(@"c:\kk\memoria.pdf", FileMode.Open, FileAccess.Read))
{
    var decryptedStream = await action.GetDecryptedStreamAsync(stream, "memoria.pdf");

    if (decryptedStream.Length == 0)
    {
        Console.WriteLine("Decrypted stream is empty.");
    }
    else
    {
        decryptedStream.Position = 0;
        using (var outputStream = new FileStream(@"c:\kk\memoria-un.pdf", FileMode.Create, FileAccess.Write))
        {
            decryptedStream.CopyTo(outputStream);
        }
    }
}
///////////////////////////////////////////////////////////////////////
public string AcquireToken(Identity identity, string authority, string resource, string claims)
{
    return AcquireTokenAsync(authority, resource, claims, isMultitenantApp).Result.AccessToken;
}

/// <summary>
/// Implements token acquisition logic via the Microsoft Authentication Library.
/// 
/// /// </summary>
/// <param name="identity"></param>
/// <param name="authority"></param>
/// <param name="resource"></param>
/// <param name="claims"></param>
/// <returns></returns>
public async Task<AuthenticationResult> AcquireTokenAsync(string authority, string resource, string claims, bool isMultiTenantApp = true)
{
    AuthenticationResult result = null;

    // Append .default to the resource passed in to AcquireToken().
    string[] scopes = new string[] { resource[resource.Length - 1].Equals('/') ? $"{resource}.default" : $"{resource}/.default" };

    result = await _app.AcquireTokenForClient(scopes)
        .ExecuteAsync();

    // Return the token. The token is sent to the resource.                           
    return result;
}  
///////////////////////////////////////////////////////////////////////
https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/wiki/Client-Applications/351a92cd4066676281d9997c13e9e192db105080
///////////////////////////////////////////////////////////////////////
https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/wiki/AuthenticationContext-the-connection-to-Azure-AD
///////////////////////////////////////////////////////////////////////
C:\DEV\SOLUTION\IIS\microsoft-authentication-library-for-dotnet-main\tests\devapps\NetCoreTestApp
C:\DEV\SOLUTION\IIS\microsoft-authentication-library-for-dotnet-main\tests
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await Task.Delay(500).ConfigureAwait(false);
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