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Environment.OSVersion Property

Gets an OperatingSystem object that contains the current platform identifier and version number.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static OperatingSystem OSVersion { get; }

Property Value

Type: System.OperatingSystem
An object that contains the platform identifier and version number.


This property was unable to obtain the system version.


The obtained platform identifier is not a member of PlatformID

Typically, the OSVersion property is used to ensure that an app is running on some base version of an operating system in which a particular feature was introduced. When this is the case, you should perform a version check by testing whether the current operating system version returned by the OSVersion property is the same as, or greater than, the base operating system version. For more information, see the Version class topic.

The OSVersion property returns the version reported by the Windows GetVersionEx function.


The OSVersion property reports the same version number ( for both Windows 8 and Windows 8.1.

In some cases, the OSVersion property may not return the operating system version that matches the version specified for the Windows Program Compatibility mode feature.

The following example displays the platform identifier and version number of the computer that runs the code example.

// Sample for the Environment.OSVersion property 
using System;

class Sample 
    public static void Main() 
    Console.WriteLine("OSVersion: {0}", Environment.OSVersion.ToString());
This example produces the following results:

OSVersion: Microsoft Windows NT 5.1.2600.0

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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