C#

Joe Albahari is the creator of LINQPad, an application that many of you use in your daily development of .NET applications/services, especially those that employ LINQ in some fashion. It's just a fantastic developer tool for C#; one that C9 celebrity genius and avid LINQPad user Brian…

In this lesson we demonstrate how events are utilized in the .NET Framework Class Library specific to WPF and ASP.NET Web Forms applications. In these examples, we see how C# is generated by the IDE to "wire up" a user action or application event to the code that…

Building on the work from the previous lesson on generic collections, in this lesson we discuss how Structured Query Language provides a means of working with sets (collections, groupings, etc.) of data. Similarly, the LINQ syntax provides a simple way of working with groups of data in generic…

Collections are a more powerful form of arrays. In this lesson we demonstrate an "old style" collection (pointing out its limitations) as well as several of the newer, strongly typed generic collections (List<T> and Dictionary<T1, T2>) utilizing the generics syntax. Download…

Exceptions occur when an application experiences some unexpected problem at run time. This lesson discusses how to use the try catch finally block to anticipate potential problems and attempt to shield the end user from those problems as much as possible. We discuss best practices when checking for…

Classes can contain many different types of information, not just Properties and Methods. In this lesson we demonstrate the use of Enumerations because in the .NET Framework Class Library, properties can often be set only to a predetermined subset of possible values. To illustrate this point we…

This lesson begins by discussing the scope of variables within code blocks, and progresses to explain how accessibility modifiers such as Public, Private, and Protected are used by the .NET Framework Class Library to expose or hide implementation of their given services to consumers of that given…

We've avoided any talk about Namespaces; however, they serve an important role in the .NET Framework Class Library as well as in our custom class libraries. In this lesson we explain how Namespaces allow us to disambiguate classes that may share the same name. Additionally, we explain how the .NET…

We've been looking at working with classes in the two previous lessons. The hope is that by better understanding how classes work, you'll gain an appreciation for how classes are utilized in the .NET Framework Class Library (FCL). In the FCL, child classes often inherit basic functionality from…

This lesson digs into more details about Classes—what exactly happens when you create a new instance of a class? What exactly is a reference to an instance of a class? How does passing the reference to a method affect a class? We also review overloaded methods, talk about static versus instance…