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Environment.ProcessorCount Property

.NET Framework 4.5

Gets the number of processors on the current machine.

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

public static int ProcessorCount { get; }

Property Value

Type: System.Int32
The 32-bit signed integer that specifies the number of processors on the current machine. There is no default. If the current machine contains multiple processor groups, this property returns the number of logical processors that are available for use by the common language runtime (CLR).

Examples

The following example demonstrates the ProcessorCount property.

C++

// This example demonstrates the  
//     Environment.ProcessorCount property. 
using System;

class Sample 
{
    public static void Main() 
    {
    Console.WriteLine("The number of processors " +
        "on this computer is {0}.", 
        Environment.ProcessorCount);
    }
}
/*
This example produces the following results:

The number of processors on this computer is 1.
*/

Version Information

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

Environment Class

System Namespace

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