How to Check the Version of C#
Today in this article, we shall see how to check which version of C# your Application is using.
We will see various easy-to-use techniques to verify the version. The below techniques can be used to verify the version on your developer machines or build a machine or cloud server.
You may find the need to check the C# version on the hosted application or server or in a cloud container etc.
We will cover the below aspects in the article,
Please note that as per recent guidelines from Microsoft default version of C# used by the application will be driven by the underlying .NET framework used (This is true for .NET or .NET Core framework used).
Get C# Version using Command line (Windows/Linux/MacOS)
Using any Shell or CLI ex. Visual Studio Command prompt:
Command
csc /langversion:?
C# compiler determines a default language version based on your project’s target framework. The target project when built gets the highest compatible language version by default as per this versioning semantics.
Get C# Version using #Error Directive
One can use the below directive to verify the c# language version.
Just type the below command anywhere in .cs file and mouse hover on it
Command
#error version
Check .NET Core version- SDK and Runtime version Programmatically
Additionally, if you are interested in knowing what version of .NET Core or framework is installed please follow the techniques discussed below,
Command
dotnet --list-sdks
For more details on the commands, please visit the below article,
C# Version using Visual Studio – Option is disabled now
Previously it used to be easy to find C# vesion by navigating the Project- Properties-> Build tab.
However as per new guidelines (explained below).. The visual studio above option is disabled.
As per Microsoft guidelines
Moving forward, however, each version of each framework will have a single supported and default version, and we won’t support arbitrary versions. To reflect this change in support, this commit permanently disables the language version combo box and adds a link to a document explaining the change.
So if using .NET or .NET Core then the framework will always target only a single language version and which will also be a default version.
The default version will be a major version of C#.
So with the above guidelines Visual Studio option to check or update the C# language version is disabled.
Project > Properties > Build > Advanced option is disabled.
Check all supported C# versions to date
Please visit the below Microsoft list,
How to Target specific version
If you need to change or target your application to use a particular C# language version, then there are various approaches to achieve this. Please refer to the below article,
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