C# Get system installed .NET version

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原文作者：唐宋元明清

原文地址： https://www.cnblogs.com/kybs0/p/16478587.html

C# Get system installed.NET版本

Get system installed.NET版本,to determine the environment in which the current application can run.

Get system installed.NET版本

Microsoft already has the corresponding full documentation,请参考：确定已安装的 .NET Framework 版本 - .NET Framework | Microsoft Docs

• ReleaseAccording to the documentation it is the version key,Should be a similar version build number,Can determine whether it is installed.NET.

• Version是.NetFramework的版本

• I sorted it outVersion的方法,方便大家获取：

private Version GetFrameworkVersion()
    {
        string registerKey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";
        var defaultVersion = new Version(0, 0);
        try
        {
            using (var sub = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(registerKey))
            {
                if (!(sub?.GetValue("Release") is int key))
                    return defaultVersion;

                //判断
                if (key >= 528040)
                    return new Version(4, 8);
                if (key >= 461808)
                    return new Version(4, 7, 2);
                if (key >= 461308)
                    return new Version(4, 7, 1);
                if (key >= 460798)
                    return new Version(4, 7);
                if (key >= 394802)
                    return new Version(4, 6, 2);
                if (key >= 394254)
                    return new Version(4, 6, 1);
                if (key >= 393295)
                    return new Version(4, 6);
                if (key >= 379893)
                    return new Version(4, 5, 2);
                if (key >= 378675)
                    return new Version(4, 5, 1);
                if (key >= 378389)
                    return new Version(4, 5);
            }
        }
        catch (Exception)
        {
            // ignored
        }
        //小于4.5,This environment generally does not exist
        return new Version(0, 0);
    }

• 注：Get a computer quickly if you need it. NET版本,可以通过 PowerShell查看

(Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client' -Name Version).Version