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Editorial Team
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Asked: 2026-06-18T16:28:11+00:00

Upon running this code: foreach (string drive in Environment.GetLogicalDrives()) Console.WriteLine(Drive: {0}, drive); Console.WriteLine(OS: {0},

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Upon running this code:

foreach (string drive in Environment.GetLogicalDrives())    
    Console.WriteLine("Drive: {0}", drive);

    Console.WriteLine("OS: {0}", Environment.OSVersion);
    Console.WriteLine("Processor count: {0}", Environment.ProcessorCount);
    Console.WriteLine(".NET version: {0}", Environment.Version);

I get

enter image description here

When I downloaded and started the .NET installer, I was told that the 4.5 version was already installed. Is there a difference between the version name, and the actual version number?

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1 Answer

  1. Editorial Team

    Yes – basically .NET 4.5 is an in-place replacement for .NET 4.0, so Environment.Version will return the same version number for the first 3 parts. The build part of the version number (18010 in your case) is different between .NET 4.0 and .NET 4.5 (and potentially updates to each) but the major/minor/patch level is 4.0.30319 in both cases.

    It’s confusing as heck, but that’s the situation, I’m afraid.

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