C# Tutorials

The C# tutorials provide an overview of the basics of the language and identify important language features. Each tutorial includes one or more sample programs. The tutorials discuss the sample code plus provide additional background information. They also link to the corresponding sample abstract topics, where you can download and run the sample programs.

Note   The C# tutorials do not teach how to create a graphical user interface for your program like a Windows Form or a Web Forms page. To get started in that area, see the Visual C# Walkthroughs.

Tutorial	Description	Level
Hello World	Shows a Hello World application.	Simple
Command Line Parameters	Shows simple command-line processing; also shows array indexing.	Simple
Arrays	Shows how to use arrays.	Simple
Properties	Shows how properties are declared and used; also demonstrates abstract properties.	Simple
Libraries	Shows how to use compiler options to create a DLL library from multiple source files; also, how to use them in other programs.	Simple
Versioning	Shows the use of override and new to support versioning.	Simple
Collection Classes	Shows how to make collection classes that can be used with foreach.	Intermediate
Structs	Shows how to use structs in C#.	Intermediate
Indexers	Shows how to use array notation to access an object.	Intermediate
Indexed Properties	Shows how to implement a class that uses indexed properties. Indexed properties allow you to use a class that represents an array-like collection of several different kinds of things.	Intermediate
User-Defined Conversions	Shows how to define conversions to and from user-defined types.	Intermediate
Operator Overloading	Shows how user-defined classes can overload operators.	Intermediate
Delegates	Shows how delegates are declared, mapped, and combined.	Intermediate
Events	Shows how to use events in C#.	Intermediate
Explicit Interface Implementation	Demonstrates how to explicitly implement interface members.	Intermediate
Conditional Methods	Demonstrates conditional methods, which provide a powerful mechanism by which calls to methods can be included or omitted depending on whether a symbol is defined.	Intermediate
XML Documentation	Shows how to document code by using XML.	Intermediate
Platform Invoke	Shows how to call platform invokes (exported DLL functions) from C#.	Advanced
COM Interop Part 1	Shows how to use C# to interoperate with COM objects. Covers a C# client.	Advanced
COM Interop Part 2	Shows how to use C# to interoperate with COM objects. Covers a C# server.	Advanced
Attributes	Shows how to create custom attribute classes, use them in code, and query them through reflection.	Advanced
Security	Discusses .NET Framework security and shows two ways to modify security permissions in C#: permission classes and permission attributes.	Advanced
Threading	Demonstrates various thread activities such as creating and executing a thread, synchronizing threads, interacting between threads, using a thread pool, and using a mutex object.	Advanced
Unsafe Code	Shows how to use pointers.	Advanced
OLE DB	Shows how to use OLE DB in C# by connecting to a Microsoft Access database.	Advanced