Response.Write() and Response.Output.Write() both does the same work for printing output on the screen. But their is a small difference between them. As we can write formatted output using Response.Output.Write() but Response.Write() can't allows the formatted output.

View state is a repository in an ASP.NET page that can store values that need to be retained during postback.

Visual Foxpro was part of Visual Studio 6.0.

It was excluded in the .Net version and was released as an independent programming language.

Even though both PL/SQL and Java (or) .NET can be used, PL/SQL stands above these two in terms of integration overhead. This is because Java is an open source proprietary and Data manipulation is slightly faster in PL/SQL than in Java. 

The following validation controls are available in ASP.NET AJAX 4.0:

        => FilteredTextBoxExtender - Enables you to apply filtering to a text box.

        => MaskedEditExtender and MaskedEditValidator - Restricts a user to enter only a certain pattern of characters in the TextBox by applying a mask to the input.

        => ValidatorCalloutExtender - Attaches to the ASP.NET validators so that the error messages are not displayed as a simple text but as a balloon-style ToolTip.

        => NoBot - Prevents the spam/bot from filling the input forms automatically and uses the Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA), which is a type of challenge-response test to ensure that the response is not generated by the computer.

        => PasswordStrengthExtender - Measures the strength of the password text entered within the text box by validating with the different strength specified parameters

ASP.NET AJAX, mostly called AJAX, is a set of extensions of ASP.NET. It is developed by Microsoft to implement AJAX functionalities in Web applications. ASP.NET AJAX provides a set of components that enable the developers to develop applications that can update only a specified portion of data without refreshing the entire page. The ASP.NET AJAX works with the AJAX Library that uses object-oriented programming (OOP) to develop rich Web applications that communicate with the server using asynchronous postback.

The ServiceInstaller class, also known as the project installer class, is used to install a Windows service.

The System.xml.dll is the real physical file, which contains the XML implementation. Some of the other namespaces that allow .NET to use XML are as follows:

      =>  System.Xml

      =>  System.Xml.Schema

      =>  System.Xml.XPath

      => System.Xml.Xsl