| C# (pronounced Csharp) is a new programming language introduced by Microsoft with the Microsoft .NET framework. It was first created in the late 1990’s as part of Microsoft’s.NET strategy. It is a new language free of backward compatibility and a bunch of new, exciting and promising features. |
| It is an Object Oriented Programming language, which at its core, and has similarities with Java, C++ and VB. The main brains behind C# were Anders Hejlsberg and Scott Wiltamuth. However, many other personalities like Rob Howard, Scott Guthrie were also involved behind C# and the .NET Framework. |
In computing, garbage collection (also known as GC) is a form of automatic memory management. The garbage collector attempts to reclaim the memory used by objects that will never be accessed again by the application. Garbage collection was invented by John McCarthy around 1959 to solve the problems of manual memory management in his recently …
Sometimes it’s inadvisable to release resource in a destructor; some resources are just too valuable and too scarce to lie around unreleased for arbitrary lengths of time. In the situations, your only option is to release the resource yourself with disposal method that disposes resources. If a class has a disposal method, you can call …
Graphics handling in Visual C#2005 is based on GDI+(GDI stands for Graphical Device Interface). A GDI+ allows you to display graphics on the screen or a printer without having to handle the details of a specific display device. You make calls to methods supported by the GDI+ classes and those methods make the corresponding …
GDI+ is next evolution of GDI for the .Net Platform. All GDI+ classes reside in the following namespaces: • System.Drawing • System.Text • System.Printing • System.Internal • System.Imaging • System.Drawing2D • System.Design The Graphics Class The Graphics class encapsulates GDI+ drawing surfaces. Before drawing any object (for example circle or rectangle) we have to create …
Drawing a rectangle You can override OnPaint event of your form to draw an rectangle. The LinearGradientBrush encapsulates a brush and linear gradient. protected override void OnPaint(PaintEventArgs pe) { Graphics g = pe.Graphics ; Rectangle rect = new Rectangle(50, 30, 100, 100); LinearGradientBrush lBrush = new LinearGradientBr ush(rect, Color.Red, Color.Yellow, LinearGradientMode.BackwardDiagonal); g.FillRectangle(lBrush, rect); …
One of the ways of permanent storage of data is through files. A file is a collection of data stored on a secondary storage device, such as the Hard Disk. Every file has a name associated with it, such as CSITquestion.txt. The name comprises of two parts the base name (in our case ‘CSITquestion) and …
A stream is a sequence of bytes traveling from a source to a destination over a communication medium. Streams can either be input stream or output stream. The input stream is used for reading while the output stream is used for writing. Note: This stream concept does not just apply to files. It holds …
Creating a DirectoryInfo or FileInfo object is very simple. The constructor takes the path to the file. DirectoryInfo di = new DirectoryInfo(“C:\\Windows”); FileInfo fi = new FileInfo(“C:\\Windows\\Notepad.exe”); Listing All Files in a Directory The following code snippet lists all the files in the “C:\Windows” directory. DirectoryInfo di = new DirectoryInfo(“C:\\Windows”); FileInfo[] …
Generics allow us to create type safe collections with no boxing and un-boxing overhead. It is a concept that allows us to achieve parametric polymorphism. C# is a strongly typed language, i.e., objects in C# should have a type to holding any value. This enforces language interoperability and security but restricts the programmer to specify the …
According to MSDN, “Generics introduce to the .NET Framework the concept of type parameters, which make it possible to design classes and methods that defer the specification of one or more types until the class or method is declared and instantiated by client code.” By using Generics, classes and methods can work uniformly on …
Collection Interfaces The .NET Framework provides two sets of standard interfaces for enumerating and comparing collections: the traditional (nontype-safe) and the new generic type-safe collections. Here we focuses only on the new, type-safe collection interfaces as these are far preferable. You can declare an ICollection of any specific type by substituting the actual …
Types In C# The C# language types are divided into three main categories: ? Value types ? reference types ? pointer types Notes: ** Value types include simple types (e.g., char, int, and float), enum types, and struct types. ** Reference types include class types, interface types, delegate types, and array types. …
A variable representing an object of Reference type contains reference or address of the actual data. Reference types are allocated on the managed heap. Different reference types are: ? The Object Type ? The class Type ? Interfaces ? Delegates ? The string type ? Arrays The object type The object class …
Microsoft is planning to release the new version 2.0 of its Dot Net Platform in summer 2005 that includes .Net 2.0 framework, enhancements in Programming Languages (C#, VB.Net, C++, J#), enhancements in ASP.Net and Visual Studio 2005. Here, we will introduce and discuss these new features from the enhancements of programming languages to .net framework …
what’s new in this C#2.0? We will introduce and discuss the new features in C# 2.0 programming language. We will explain these new features of C# 2.0 like generics, partial classes, object-oriented and other language enhancements and demonstrate it with sample source code. It is most suitable for those people who have worked with C#2.0 …
On the heels of the Visual Studio 2005 and C# 2.0 releases, Microsoft has given a sneak preview of what to expect in the version after the next: C# 3.0. Even though C# 3.0 is not even standardized yet, Microsoft provided a preview release at its Professional Developers Conference (PDC) in September so eager developers …