Which version of C am I using

Question

I want to find out which version of C  I m using  If I would be using python I would do something like python -V from the command line  or type   import sys print sys version   In PHP I would do something like this  phpinfo    in java  java -version  But I was not able to find how to achieve this in C    This question does not answer it  although the name suggests that it should   I got that it depends on the  NET framework  but is there a programmatic way of figuring out my framework  I mean without going to the directory and checking the name of my  NET folders

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NET version through registry  HKEY LOCAL MACHINE SOFTWARE Microsoft NET Framework Setup NDP  explore the children and look into each version  The one with key  Full  is the version on the system   https   support microsoft com en-us kb 318785 https   msdn microsoft com en-us library hh925568 v vs 110  aspx   NET version through Visual Studio  Help -  About Microsoft Visual Studio -  The  NET version is specified on the top right   As I understand at this time the Visual studio uses  NET Framework from the OS   The target  NET Framework version of a project in Visual Studio can be modified with Project Properties -  Application -  Target Framework  Through the dll  If you know the  NET Framework directory e g  C  Windows Microsoft NET Framework64 v4 0 30319  Open System dll  right click -  properties -  Details tab  C  version  Help -  About Microsoft Visual Studio  In the installed products lists there is Visual C   In my case Visual C  2015  Visual Studio  Microsoft  ships C  by name Visual C    https   msdn microsoft com en-us library hh156499 aspx  C  6  Visual Studio  NET 2015 Current version  see below

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Useful tip for finding the C  version   To know what language version you re currently using  put  error version  case sensitive  in your code  This makes the compiler produce a diagnostic  CS8304  with a message containing the compiler version being used and the current selected language version   From C  language versioning in MS docs  You can drop  error version anywhere in your code   It will generate an error so you ll need to remove it after you ve used it   The error gives details of the compiler and language versions  eg  Error   CS8304  Compiler version   3 7 0-6 20459 4  7ee7c540    Language version  8 0   In VS 2019  at least  you don t need to compile your code for  error version to give you the version number   Just mousing over it in your code will bring up the same error details you would see when you compile the code

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Here is an overview of how the  NET framework and compiler versions are related  set and modified  Each project has a target  NET framework version s   for example version 3 x or 2 x    The  NET framework contains the run time types and components   The Visual Studio version installation and the  NET framework version determine the compatible c  language version and compiler options that can be used  The default c  version and options used in a Visual Studio project is the latest language version installed that is compatible with the  NET framework version being used     To view or update the Framework or C  language within a project within Visual Studio 2011    right click the project within Solution Explorer and select Properties select  Application  in the left navigation pane   Under Target framework  is the  NET framework version  Select the down arrow to see all available framework versions  select  Build  in the left navigation pane  In the  General  section of the pane next to  Language Version   is the c  compiler language version being used  for example  default  or c  5 0 select the down arrow in the  Language Version   dropdown to see all available language versions  If  default  is the c  version being used  the latest compatible c  language version will be used    To see the exact compiler language version for  default   enter the following in the developer command prompt for your installed Visual Studio version  For example  from the Windows Start icon select icon   Developer Command Prompt for VS2011  and enter      csc -langversion Default   Microsoft  R  Visual C  Compiler version 4 7 3062 0 for c  5

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The C  version you are using totally depends upon the  Net version you are using   if you are using visual studio for development  you get to choose the  net framework version  the c  version associated with it comes accordingly  These are the versions of C  known         C  1 0 released with  NET 1 0 and VS2002  January 2002    C  1 2  bizarrely enough   released with  NET 1 1 and VS2003  April 2003   First version to call Dispose on IEnumerators which implemented IDisposable  A few other small features    C  2 0 released with  NET 2 0 and VS2005  November 2005   Major new features  generics  anonymous methods  nullable types  iterator blocks   C  3 0 released with  NET 3 5 and VS2008  November 2007   Major new features  lambda expressions  extension methods  expression trees  anonymous types  implicit typing  var   query expressions   C  4 0 released with  NET 4 and VS2010  April 2010   Major new features  late binding  dynamic   delegate and interface generic variance  more COM support  named arguments and optional parameters   C  5 0 released with  NET 4 5 in August 2012       Refrence  Jon Skeet s C  Versions Answer

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The language version is chosen based on the project s target framework by default    Each project may use a different version of  Net framework  the best suitable C  compiler will be chosen by default by looking at the target framework  From visual studio  UI will not allow the users to changes the language version  however  we can change the language version by editing the project file with addition of new property group  But this may cause compile run time issues in existing code    lt PropertyGroup gt     lt LangVersion gt 8 0 lt  LangVersion gt     lt  PropertyGroup gt    I could see the following from Microsoft docs   The compiler determines a default based on these rules   Target framework  version     C  language version default  NET Core           3 x         C  8 0  NET Core           2 x         C  7 3  NET Standard       2 1         C  8 0  NET Standard       2 0         C  7 3  NET Standard       1 x         C  7 3  NET Framework      all         C  7 3

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By default following are corresponding version of C  compilers for Visual Studio    Visual Studio 2015  C  6 0 Visual Studio 2013  C  5 0 Visual Studio 2012  C  5 0 Visual Studio 2010  C  4 0 Visual Studio 2008  C  3 0 Visual Studio 2005  C  2 0 Visual Studio NET 2003  C  1 2 Visual Studio NET 2002  C  1 0   You can also modify version please follow below steps   Open the project properties window   step 1  Right click on the Project Name step 2  Select  Properties   last option in menu  step 3  Select  Build  from left hand side options and scroll till down step 4  click on  Advance  button  step 5  It will open a popup and there you will get  Language Version  dropdown step 6  Select desired version of C  and Click  OK

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Thanks to  fortesl and this answer  I m using VS 2019 and it doesn t easily tell you the C  version you are using   I m working with  Net Core 3 0  and VS 2019 using C  8 in that environment   But  csc -langversion    makes this clear   D   gt csc -langversion   Supported language versions  default 1 2 3 4 5 6 7 0 7 1 7 2 7 3 8 0  default  latestmajor preview latest   Not sure what csc -version is identifying   D   gt csc --version Microsoft  R  Visual C  Compiler version 3 4 0-beta1-19462-14  2f21c63b  Copyright  C  Microsoft Corporation  All rights reserved

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While this isn t answering your question directly  I m putting this here as google brought this page up first in my searches when I was looking for this info   If you re using Visual Studio  you can right click on your project -  Properties -  Build -  Advanced This should list available versions as well as the one your proj is using

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The current answers are outdated  You should be able to use  error version  at the top of any C  file in the project  or nearly anywhere in the code   The compiler treats this in a special way and reports a compiler error  CS8304  indicating the language version  and also the compiler version  The message of CS8304 is something that looks like the following   error CS8304  Compiler version   3 7 0-3 20312 3  ec484126    Language version  6

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It depends upon the  NET Framework that you use   Check Jon Skeet s answer about Versions  Here is short version of his answer   C  1 0 released with  NET 1 0   C  1 2  bizarrely enough   released with  NET 1 1   C  2 0 released with  NET 2 0 C  3 0 released with  NET 3 5 C  4 0 released with  NET 4 C  5 0 released with  NET 4 5 C  6 0 released with  NET 4 6 C  7 0 is released with  NET 4 6 2 C  7 3 is released with  NET 4 7 2 C  8 0 is released with NET Core 3 0 C  9 0 is released with NET 5 0

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In order to see the installed compiler version of VC   Open Visual Studio command prompt and just type csc then press Enter  You will see something like following   Microsoft  R  Visual C  Compiler version 4 0 30319 34209 for Microsoft  R   NET Framework 4 5 Copyright  C  Microsoft Corporation  All rights reserved   P S    quot CSC quot  stand for  quot C Sharp Compiler quot   Actually using this command you run csc exe which is an executable file which is located in  quot c  Windows Microsoft NET Framework vX X XXX quot   For more information about CSC visit http   www file net process csc exe html

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From developer command prompt type  csc -langversion     That will display all C  versions supported including the default   1 2 3 4 5 6 7 0  default  7 1 7 2 7 3  latest

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To get the C  version from code  use this code from the Microsoft documentation to get the  NET Framework version and then match it up using the table that everyone else mentions  You can code up the Framework to C  version map in a dictionary or something to actually have your function return the C  version  Works if you have  NET Framework    4 5   using System  using Microsoft Win32   public class GetDotNetVersion      public static void Main              Get45PlusFromRegistry             private static void Get45PlusFromRegistry              const string subkey     SOFTWARE Microsoft NET Framework Setup NDP v4 Full           using  var ndpKey   RegistryKey OpenBaseKey RegistryHive LocalMachine  RegistryView Registry32  OpenSubKey subkey                   if  ndpKey    null  amp  amp  ndpKey GetValue  Release      null                Console WriteLine    NET Framework Version   CheckFor45PlusVersion  int  ndpKey GetValue  Release                           else               Console WriteLine   NET Framework Version 4 5 or later is not detected                                   Checking the version using  gt   enables forward compatibility        string CheckFor45PlusVersion int releaseKey                   if  releaseKey  gt   528040              return  4 8 or later            if  releaseKey  gt   461808              return  4 7 2            if  releaseKey  gt   461308              return  4 7 1            if  releaseKey  gt   460798              return  4 7            if  releaseKey  gt   394802              return  4 6 2            if  releaseKey  gt   394254              return  4 6 1                  if  releaseKey  gt   393295              return  4 6                  if  releaseKey  gt   379893              return  4 5 2                  if  releaseKey  gt   378675              return  4 5 1                  if  releaseKey  gt   378389              return  4 5                     This code should never execute  A non-null release key should mean             that 4 5 or later is installed           return  No 4 5 or later version detected                        This example displays output like the following            NET Framework Version  4 6 1

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If you are using VS2015 then follow below steps to find out the same    Right click on the project  Click on the Properties tab  From properties window select Build option  In that click on the Advance button  There you will find out the language version    Below images show the steps for the same   Step 1     Step 2

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To get version of framework - look at version of one of main Assemblies i e     Console Write typeof string  Assembly ImageRuntimeVersion     Getting version of C  compiler is somewhat harder  but you should be able to guess version by checking what framework  version is used   If you are using command line compiler  csc exe  you can check help to see version  also you d need to know Framework version anyway   C  Windows Microsoft NET Framework v4 0 30319 gt csc    Microsoft  R  Visual C  2010 Compiler version 4 0 30319 1

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Most of the answers are correct above  Just consolidating 3 which I found easy and super quick  Also  1 is not possible now in VS2019   Visual Studio  Project  gt  Properties  gt  Build  gt  Advanced This option is disabled now  and the default language is decided by VS itself  The detailed reason is available here   Type  quot  error version quot  in the code  cs  anywhere  mousehover it   Go to  Developer Command Prompt for Visual Studio  and run following command  csc -langversion      Read more tips  here

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For Windows  you run dev at the command  search program line and select Developer Command Prompt for VS  Then you are going to just run  csc   Now you get information similar to  Microsoft  R  Visual C  Compiler version 2 6 0 62329  5429b35d  Copyright  C  Microsoft Corporation  All rights reserved       For Windows and if you start with cmd terminal  cd C  Windows Microsoft NET Framework  dir   Now you see all directories and files in  NET Framework  Please  select v    latest and go there  for example   cd v4 0 30319   Run  csc   You will see information about version of C  compiler  that can be something similar to  Microsoft  R  Visual C  Compiler version 4 7 2556 0 for C  5 Copyright  C  Microsoft Corporation  All rights reserved

[c#] Which version of C# am I using

.NET version through registry

.NET version through Visual Studio

Through the dll

C# version

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