Download Accelerated C Sharp 2010 Jan 2010 by Trey Nash PDF

By Trey Nash

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However, code blocks, such as those in braces in an if or a while statement, do not need to be terminated with a semicolon. Adding the semicolon is optional at the end of a block. Most of the statements that are available in C++ and Java are available in C#, including variable declaration statements, conditional statements, control flow statements, try/catch statements, and so on. However, C# (like Java) has some statements that are not available in C++. For example, C# provides 20 CHAPTER 3 ■ C# SYNTAX OVERVIEW a try/finally statement, which I discuss in detail in Chapter 7.

Additionally, if the CLR determines that different parts of code scattered all over the application are called rather frequently, it has the liberty to move them in memory so that they are all within the same group of memory pages, thus minimizing the number of page faults and increasing the cache hits as the application runs. Additionally, the CLR could perform branch optimization at any time by re-JIT compiling code whereas in native applications, one must perform Profile-Guided Optimization where those optimizations are based on what the developer assumes is the most likely platform configuration on which the user is running the application.

C# also overloads the using keyword, so you can use it either as a directive or a statement. You can use a using statement in concert with the Disposable pattern I describe in Chapters 4 and 13. The foreach statement, which makes iterating through collections easier, also deserves mention. You’ll see more of this statement in Chapter 9, when I discuss collection types. Types and Variables Every entity in a C# program is an object that lives on either the stack or the managed heap. Every method is defined in a class or struct declaration.

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