How to create MFA in .Net Windows using Okta .Net?

[Roopesh]

Iam using following :
What code should i need to use in below MFA condition, please send examples ?

using Okta.Auth.Sdk;
using Okta.Sdk.Abstractions.Configuration;

var authClient = new AuthenticationClient(new OktaClientConfiguration
{
OktaDomain = “Domain Name”

});

var authenticateOptions = new AuthenticateOptions
{
Username = username,
Password = password
};

var authResponse = await authClient.AuthenticateAsync(authenticateOptions);

if (authResponse.AuthenticationStatus == AuthenticationStatus.MfaRequired)
{
???
}