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How to use C# 7 with Visual Studio 2015?

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How is C used?

C is highly portable and is used for scripting system applications which form a major part of Windows, UNIX, and Linux operating system. C is a general-purpose programming language and can efficiently work on enterprise applications, games, graphics, and applications requiring calculations, etc.

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It is a bit more cryptic in its style than some other languages, but you get beyond that fairly quickly. C is what is called a compiled language. This means that once you write your C program, you must run it through a C compiler to turn your program into an executable that the computer can run (execute).

How do I start programming with C?

To start using C, you need two things: A text editor, like Notepad, to write C code. A compiler, like GCC, to translate the C code into a language that the computer will understand.


You can replace the compiler shipped with Visual Studio for a C# 7-enabled version by installing the Nuget package Microsoft.Net.Compilers:

Referencing this package will cause the project to be built using the specific version of the C# and Visual Basic compilers contained in the package, as opposed to any system installed version.

There is no indication that I can see on the package page as to whether this is officially supported in Visual Studio 2015. My not-thorough tests so far indicate that it works but not painlessly - C# 7 code compiles, but is underlined with the red squiggly line which indicates a syntax error: ScreenshotNote that you will also need to install the Nuget package System.ValueTuple to use the new C# 7 value tuples features.


In my case, installing just Microsoft.Net.Compilers didn't work. Instead, I had to do the following:

  1. Install Microsoft.CodeDom.Providers.DotNetCompilerPlatform for the project (Tools => NuGet Package Manager => Manage Nuget Packages for Solution...) and install Microsoft.CodeDom.Providers.DotNetCompilerPlatform.
  2. Install the latest Microsoft.Net.Compilers for the project
  3. Install any other NuGet package for the latest C# feature you want to use. In my case, my goal was to use Tuples, so I installed System.ValueTuple and worked fine.

But still note that C# codes which are not known by Visual Studio 2015 default compiler will still have red squiggles underneath.


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