Device Code Flow causes NotImplementedException for non-Entra authorities

[DharshanBJ]

Library version used

4.68.0

.NET version

9.0.102

Scenario

PublicClient - desktop app

Is this a new or an existing app?

This is a new app or experiment

Issue description and reproduction steps

microsoft-authentication-library-for-dotnet/src/client/Microsoft.Identity.Client/Instance/GenericAuthority.cs

Line 43 in 235d32d

throw new NotImplementedException();

Relevant code snippets

pca.AcquireTokenWithDeviceCode(Scopes, deviceCodeResult =>
{
    Console.WriteLine(deviceCodeResult.Message);
    return Task.FromResult(0);
}).ExecuteAsync();

Expected behavior

A token should be retrieved, using the device code flow

Identity provider

Other

Regression

No response

Solution and workarounds

No response

[DharshanBJ]

Device code flow isn't supported for non-Entra Idenity Providers.