Store Azure AzureADB2C object in ASP .NET MVC application as a Key Vault secret

Question

I have AzureADB2C object in my ASP.NET MVC application stored in the appsettings.json file.

I want to store Azure AzureADB2C object as a Key Vault secret and then access it from Program.cs like so:

builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
                .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureADB2C"));

How can I do it?

I implemented cloud authentication in my app using the following instruction

Answer 1

Based on this answer I was able to do the following changes

In Program.cs before adding authentication with Microsoft identity platform, I pasted the following code:

IConfiguration azureADB2C = builder.Configuration.GetSection("AzureADB2C");

azureADB2C["TenantId"] = builder.Configuration.GetSection("TenantId").Value;
azureADB2C["ClientId"] = builder.Configuration.GetSection("ClientId").Value;
azureADB2C["ClientSecret"] = builder.Configuration.GetSection("ClientSecret").Value;

In appsettings.json I left the corresponding values empty:

"AzureAdB2C": {
  "TenantId": "",
  "ClientId": "",
  "ClientSecret": "",
  ...
}