TLDR questions

• Why do command lines now have two hyphens (--) behind each parameter? Where did it originate, why not use a single hyphen? [duplicate]
• Possible to Lock() within a Closure? What does that look like in Lambdas and code output?
• What should I know about cookies domain and scope for security purposes?
• How do I configure "key material" in Identity Server 4 to use SQL, KeyVault, or any other system?
• Can Azure AD (work) accounts be used with Azure B2C? Is that a bad idea? [closed]
• Xamarin.Android.Targets fails with error "Input string was not in a correct format."
• How can I use Microsoft.Extensions.DependencyInjection in an .NET Core console app?

TLDR answers