A Programmer's Guide to C# 5.0 - download pdf or read online

By Eric Gunnerson

ISBN-10: 143024593X

ISBN-13: 9781430245933

A Programmer’s consultant to C# 5.0 is a e-book for software program builders who are looking to really comprehend C#. no matter if you’ve labored with C# sooner than or with one other general-purpose programming language, each one fast moving, centred bankruptcy will take you directly to the guts of a function of C# and convey you why it really works how it does.

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33 Chapter 5 ■ Exception Handling Trying and Catching To deal with exceptions, code needs to be organized a bit differently. The sections of code that might throw exceptions are placed in a try block, and the code to handle exceptions in the try block is placed in a catch block. WriteLine("After catch"); } } The try block encloses an expression that will generate an exception. In this case, it will generate an exception known as DivideByZeroException. NET Runtime stops executing code and searches for a try block surrounding the code in which the exception took place.

C++ code can be written without using exception handling, but that’s not an option in C#. The second reason is that it allows the code examples to be better. If exception handling is presented late in the book, early code samples can’t use it, and that means the examples can’t be written using good programming practices. What’s Wrong with Return Codes? success) { // process the error } This works okay, but every return value has to be checked for an error. If the above was written as CallFunction(); any error return would be thrown away.

If it finds more than one match, things are a bit more complicated (see the “Better Conversions” section below). For an argument to match a parameter, it must fit one of the following cases: • The argument type and the parameter type are the same type. • An implicit conversion exists from the argument type to the parameter type and the argument is not passed using ref or out. Note that in the previous description, the return type of a function is not mentioned. 2 Additionally, because out is a C#-only construct (it looks like ref to other languages), there cannot be a ref overload and an out overload that differ only in their ref and out-ness.

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A Programmer's Guide to C# 5.0 by Eric Gunnerson

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