Identify my dotnet version [duplicate]

This question already has answers here: Is there an easy way to check the .NET Framework version? (23 answers) Closed 2 years ago.

How can I check fro开发者_如何学编程m a c# application itself, what version of dotnet being used by application?

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Use Environment.Version - it gives you the exact version of .NET running the application.

Gets a Version object that describes the major, minor, build, and revision numbers of the common language runtime.

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To find out what version of the framework is installed, see this SO question and answers. In a nut shell, you will need to dig into the registry.

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You can use the:

Environment.Version

to get the version number of the .NET runtime.

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Create a Console app add this class and run it

 using Microsoft.Win32;
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    namespace ConsoleApplication2
    {
        public class GetDotNetVersion
        {
            public static void Get45PlusFromRegistry()
    {
        const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";
        using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(subkey))
        {
            if (ndpKey != null && 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 >= will enable forward compatibility.
    private static string CheckFor45PlusVersion(int releaseKey)
    {
        if (releaseKey >= 394802)
            return "4.6.2 or later";
        if (releaseKey >= 394254)
        {
            return "4.6.1";
        }
        if (releaseKey >= 393295)
        {
            return "4.6";
        }
        if ((releaseKey >= 379893))
        {
            return "4.5.2";
        }
        if ((releaseKey >= 378675))
        {
            return "4.5.1";
        }
        if ((releaseKey >= 378389))
        {
            return "4.5";
        }
        // This code should never execute. 
        // that 4.5 or later is installed.
        return "No 4.5 or later version detected";
    }
 }
 // Calling the GetDotNetVersion.Get45PlusFromRegistry method produces 
 // output like the following:
 //       .NET Framework Version: 4.6.1
 }

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In your Visual Studio, go to Tools->Nutget Package Management->Package Manager Console Type in dotnet --version And here you go!