Programming C# 3.0 by Jesse Liberty, Donald Xie

By Jesse Liberty, Donald Xie

Written by way of well known writer and .NET professional Jesse Liberty, this completely up to date educational for commencing to intermediate programmers covers the newest liberate of Microsoft's renowned C# language (C# 3.0) and the most recent .NET platform for constructing home windows and internet purposes. Our bestselling Programming C# 3.0, now in its 5th version, is a world-class educational that is going way past the documentation in a different way to be had. Liberty does not simply educate C#; he tells the entire tale of the C# language and the way it integrates with all of .NET programming, for you to start developing expert caliber net and home windows functions. This e-book:

  • Provides a entire educational in C# and .NET programming that still serves as an invaluable reference you will need via your facet when you are working
  • Covers the entire new gains of the language, completely built-in into each bankruptcy, instead of tacked on on the end
  • Provides perception into most sensible practices and perception into genuine global programming by way of a certified programmer who labored with C# as an self sufficient contractor for almost a decade ahead of becoming a member of Microsoft as a Senior software Manager
  • Every bankruptcy during this ebook has been completely revised, and the total booklet has been reorganized to reply to the numerous adjustments within the language
  • Full assurance, from the floor up of LINQ (Language built-in question) and different C# 3.0 language suggestions to hurry up improvement tasks
  • Explains the best way to use C# in developing net functions in addition to home windows functions, utilizing either the recent home windows Presentation beginning (WPF) and the older WinForms technology

This re-creation of Programming C# 3.0 is for operating programmers who are looking to improve skillability in Microsoft's most crucial language. No previous .NET adventure is needed that you can start. there is not any time just like the current to paintings with C# -- and no booklet like this one to educate you every thing you want to comprehend. designated observe to VB6 and Java programmers: if you've got made up our minds to transition to .NET, this publication will take you there.

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If the temperature is exactly 32 degrees, the program should tell you that there may be ice patches. There are many good ways to write this program. Example 3-8 illustrates one approach, using nested if statements. Example 3-8. Text; namespace NestedIf { class NestedIf { Statements | 37 Example 3-8. WriteLine( "Warning! WriteLine( "Watch for black ice! Temp: {0}", temp ); } // end else } // end if (temp <= 32) } // end main } // end class } // end namespace The logic of Example 3-8 is that it tests whether the temperature is less than or equal to 32.

I cover the foreach statement in detail in Chapter 9. Write( ), which is much like WriteLine( ), but which doesn’t enter a newline, allowing the subsequent writes to occur on the same line. A few quick points to notice: in a for loop, the condition is tested before the statements are executed. Thus, in the example, i is initialized to 0, and then it is tested to see whether it is less than 100. Because i < 100 returns true, the statements within the for loop are executed. After the execution, i is incremented (i++).

Example 3-2. WriteLine("Assigned, myInt: {0}", myInt); } } When you try to compile this listing, the C# compiler will display an error message, as shown in Figure 3-1. Figure 3-1. Error message resulting from using an unassigned variable Double-clicking the error message will bring you to the problem in the code. It isn’t legal to use an uninitialized variable in C#. Does this mean you must initialize every variable in a program? In fact, no: you don’t actually need to initialize a variable, but you must assign a value to it before you attempt to use it.

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