Professional C# 7 and .NET Core 2.0, 7th Edition

2Core C#

WHAT’S IN THIS CHAPTER?

• Declaring variables
• Initialization and scope of variables
• Working with redefined C# data types
• Dictating execution flow within a C# program
• Organizing classes and types with namespaces
• Getting to know the Main method
• Using internal comments and documentation features
• Using preprocessor directives
• Understanding guidelines and conventions for good programming in C#

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

The Wrox.com code downloads for this chapter are found at www.wrox.com on the Download Code tab. The source code is also available at https://github.com/ProfessionalCSharp/ProfessionalCSharp7 in the directory CoreCSharp.

The code for this chapter is divided into the following major examples:

• HelloWorldApp
• VariablesSample
• VariableScopeSample
• IfStatement
• ForLoop
• NamespacesSample
• ArgumentsSample
• StringSample

FUNDAMENTALS OF C#

Now that you understand more about what C# can do, you need to know how to use it. This chapter gives you a good start in that direction by providing a basic understanding of the fundamentals of C# programming, which is built on in subsequent chapters. By the end of this chapter, you will know enough C# to write simple programs (though without using inheritance or other object-oriented features, which are covered in later chapters).

Hello, World!

Chapter 1, “.NET Application Architectures and Tools,” shows how to create a Hello, World! application using the .NET Core CLI tools, Visual Studio, Visual Studio for ...