saidout 

Parameter guard extensions for .NET that checks that a parameter meets the requirements and throws an ArgumentException if it doesn't.

Contain classes that generate random data/value using a cryptographic random number generator.

Contain extensions that, takes a type and return a string or takes a string and return a type.

ASP.NET Core middleware that enforce that https scheme is used and that adds the HTTP Strict Transport (HSTS) header for all HTTP responses to request made using https scheme.