HashSet is an unordered collection.
The default EqualityComparer checks whether the element supplied to the HashSet is unique or not.
HashSet provides functionality for "conceptual sets" where the rules for membership can be specified without actually creating all of the items.
All of the above
A calendar divides time into units, such as weeks, months, and years. The number, length, and start of the divisions vary in each calendar. Useful resources, Calendar class
ASP.NET authentication cannot be used to control access.
ASP.NET authentication handles these by default in a manner equivalent to .aspx pages.
The extension can be associated with aspnet_isapi.dll in IIS for the appropriate directory.
A custom HTTP Request processor must be installed to examine the URL's and determine the appropriate access rights.
The PreRender event occurs for each control on the page. Use the event to make final changes to the contents of the page or its controls. Useful resources, ASP.NET Page Life Cycle Overview
A certificate must be installed on the server.
The certificate must mach the web address to prevent a browser warning or error.
The certificate must be issued by an authority recognized by the client computer to prevent a browser warning or error.
All of the above.
Useful resources, SSL Certificates
A Nullable type is a reference type.
An implicit conversion exists from any non-nullable value type to a nullable form of that type.
A predefined conversion from the nullable type S? to the nullable type T? exists if there is a predefined conversion from the non-nullable type S to the non-nullable type T
Useful resources, Nullable Types
It must be enabled in the web.config of the ASP.Net application.
Forms Authentication must be enabled in the web.config of the ASP.Net Application.
Cookies must be enabled in the browser.
A redirection url must be supplied for successful login.
Useful resources, Forms Authentication with Microsoft Ajax
The @ Register directive declares the control's tag prefix and the location of the control's assembly. You must use this directive if you want to add user controls or custom ASP.NET controls to a page. Useful resources, ASP.NET Web Page Syntax
You can request that the garbage collector processes a generation if it determines that it is appropriate at specific points in your code
You can control the intrusiveness of the garbage collector (how often it performs collections) while your program is running
You can control the intrusiveness of the garbage collector (how often it performs collections) only during application initialization
You should specify LowLatency when using Concurrent Server Garbage Collection to improve memory utilization