C# detect latest .net framework installed on PC（count）

C# detect latest - framework installed on PC（count）

using Microsoft.Win32;

static void Main(string[] args)

{

GetDotNetFrameworkVersion();

Console.ReadLine();

}

static void GetDotNetFrameworkVersion()

{

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 && ndpKey.GetValue("Release")!=null)

{

var objResult = ndpKey.GetValue("Release");

var versionResult = CheckFor45PlusVersion((int)objResult);

Console.WriteLine($".NET Framework Version:{versionResult}");

}

else

{

Console.WriteLine(".NET Framework Version 4.5 or later is not detected!");

}

}

}

//Convert the Main.Minor.Build.Revision

static string CheckFor45PlusVersion(int releaseKey)

{

if(releaseKey>=528040)

{

return "4.8 or later";

}

if(releaseKey>=461808)

{

return "4.7.2";

}

if(releaseKey>=461308)

{

return "4.7.1";

}

if (releaseKey >= 460798)

{

return "4.7";

}

if(releaseKey>=394802)

{

return "4.6.2";

}

if(releaseKey>=394254)

{

return "4.6.1";

}

if(releaseKey>=393295)

{

return "4.6";

}

if(releaseKey>=393295)

{

return "4.5.2";

}

if(releaseKey>=378675)

{

return "4.5.1";

}

if(releaseKey>=378389)

{

return "4.5";

}

return "No 4.5 or later version detected!";

}

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