title: How to direct user to custom B2C journey that is not Sign/Signup, Edit or Reset Password in .NET C#
body: <p>I have some B2C user journeys that do not fall into SignIn/SignUp, Edit Profile, SignOut or ResetPassword.  These are to Link/Unlink external IDPs to a local account, and Edit just the MFA phone number.</p>
  <p>All the C# examples I can find reference the Microsoft.Identity.Web package as the controller and those 4 actions are built-in, but I cannot find a way to call a custom policy Id.</p>
  <p><a href="https://docs.microsoft.com/en-us/dotnet/api/microsoft.identity.web.microsoftidentityoptions?view=azure-dotnet" rel="nofollow noreferrer">MicrosoftIdentity.Options Library Reference</a></p>