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Mastering Visual Studio 2017

You're reading from   Mastering Visual Studio 2017 Build windows apps using WPF and UWP, accelerate cloud development with Azure, explore NuGet, and more

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781787281905
Length 466 pages
Edition 1st Edition
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Author (1):
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Kunal Chowdhury Kunal Chowdhury
Author Profile Icon Kunal Chowdhury
Kunal Chowdhury
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Table of Contents (11) Chapters Close

Preface 1. What is New in Visual Studio 2017 IDE? 2. What is New in C# 7.0? FREE CHAPTER 3. Building Applications for Windows Using XAML Tools 4. Building Applications for Windows 10 Using UWP Tools 5. Building Applications with .NET Core 6. Managing NuGet Packages 7. Debugging Applications with Visual Studio 2017 8. Live Unit Testing with Visual Studio 2017 9. Accelerate Cloud Development with Microsoft Azure 10. Working with Source Controls

New changes with the out variables

Currently in C#, we need to first declare a variable before we pass it as an out parameter to a method. You can use a var while declaration if you initialize them in the same line, but when you don't want to initialize explicitly, you must declare them, specifying the full type:

    // predeclaration of 'out' variable was mandatory 
    int result; // or, var result = 0; 
    string value = "125"; 
 
    int.TryParse(value, out result); 
 
    Console.WriteLine("The result is: " + result); 

In C# 7.0, the out variables can be declared right at the point where they are passed as an out parameter to a method. You can now directly write int.TryParse(value, out int result); and get the value of the out parameter, to use it in the scope of the enclosing block:

    static void Main(string[] args) 
    { 
      string...
You have been reading a chapter from
Mastering Visual Studio 2017
Published in: Jul 2017
Publisher: Packt
ISBN-13: 9781787281905
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