You work as a Software Developer for ABC Inc. The company uses Visual Studio .NET 2008 as its application development platform. You create an ASP.NET Web application using .NET Framework 3.5. You utilize the built-in ASP.NET Web server controls in all the Web forms of the application. You access and modify the properties of all Web server controls in the code behind code of the Web forms. You are required to include custom client-side and AJAX behavior to the ASP.NET Web server controls. You are also required to ensure nominal effect on the current application code. What will you do?

Each correct answer represents a part of the solution. Choose two.