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.netversion
programstinator
programstinator

Reputation: 1376

Environment.Version returns a version number not matching the "version name"

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?

Upvotes: 0

Views: 463

Answers (3)

picolino
picolino

Reputation: 5404

Starting with .NET Core 3.0 (and .NET Standard 2.1) situation is changed and now Environment.Version working properly.

System.Console.WriteLine($"Environment.Version: {System.Environment.Version}");

// Old result
//   Environment.Version: 4.0.30319.42000
//
// New result
//   Environment.Version: 3.0.0

See documentation for further information.

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1500185

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.

Upvotes: 4

Oded
Oded

Reputation: 498972

.NET 4.5 is a drop-in replacement for 4.0 - the version number is indeed what you see.

Check the versions of the assemblies in the reference assemblies directory.

Upvotes: 2

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