how to add azure ad authentication to existing asp.net C#

We have developed a tool using VS8 .Net framework 3.5 with C# and would want to move it to ADFS enabled. To clarify we have not used MVC at all.

Can you share the sample code to get ADFS enabled for the existing .Net web application developed in VS8, .Net with C# (Not MVC Project).

Thanks

Shreenath

For Azure AD Authentication,

private static readonly string Username = "YourUserName";
private static readonly string Password = "PASSWORD";
private static readonly string AuthorityUrl = @"https://login.windows.net/common/oauth2/token/";
private static readonly string ResourceUrl = @"RESOURCEURL";
private static readonly string ClientId = "YOURCLIENTID";
public static async Task GetToken()
{
var oauthEndpoint = new Uri(AuthorityUrl);
using (var client = new HttpClient())
{
var result = await client.PostAsync(oauthEndpoint, new FormUrlEncodedContent(new[]
{
new KeyValuePair("resource", ResourceUrl),
new KeyValuePair("client_id", ClientId),
new KeyValuePair("grant_type", "password"),
new KeyValuePair("username", Username),
new KeyValuePair("password", Password),
new KeyValuePair("scope", "openid"),
}
));
var content = await result.Content.ReadAsStringAsync().ConfigureAwait(false);
return JsonConvert.DeserializeObject(content);
}
}

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