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Process.WorkingSet Property

Gets the associated process's physical memory usage.

[Visual Basic]
Public ReadOnly Property WorkingSet As Integer
[C#]
public int WorkingSet {get;}
[C++]
public: __property int get_WorkingSet();
[JScript]
public function get WorkingSet() : int;

Property Value

The total amount of physical memory the associated process is using, in bytes.

Exceptions

Exception Type Condition
PlatformNotSupportedException You are accessing this member using Windows 98.

Remarks

The working set of a process is the set of memory pages currently visible to the process in physical RAM memory. These pages are resident and available for an application to use without triggering a page fault.

The working set includes both shared and private data. The shared data includes the pages that contain all the instructions that your application executes, including the pages in your .dll files and the system .dll files.

Example

[Visual Basic, C#, C++] The following example starts an instance of Notepad. The example then retrieves and displays various properties of the associated process. The example detects when the process exits, and displays the process's exit code.

[Visual Basic] 
Imports System
Imports System.Diagnostics
Imports System.Threading

Namespace Process_Sample
   Class MyProcessClass

      Public Shared Sub Main()
         Try

            Dim myProcess As Process
            myProcess = Process.Start("NotePad.exe")

            While Not myProcess.HasExited

               Console.WriteLine()
               
               ' Get physical memory usage of the associated process.
               Console.WriteLine("Process's physical memory usage: " + _
                                      myProcess.WorkingSet.ToString)
               ' Get base priority of the associated process.
               Console.WriteLine("Base priority of the associated process: " + _
                                      myProcess.BasePriority.ToString)
               ' Get priority class of the associated process.
               Console.WriteLine("Priority class of the associated process: " + _
                                      myProcess.PriorityClass.ToString)
               ' Get user processor time for this process.
               Console.WriteLine("User Processor Time: " + _
                                      myProcess.UserProcessorTime.ToString)
               ' Get privileged processor time for this process.
               Console.WriteLine("Privileged Processor Time: " + _
                                   myProcess.PrivilegedProcessorTime.ToString)
               ' Get total processor time for this process.
               Console.WriteLine("Total Processor Time: " + _
                                     myProcess.TotalProcessorTime.ToString)
               ' Invoke overloaded ToString function.
               Console.WriteLine("Process's Name: " + myProcess.ToString)
               Console.WriteLine("-------------------------------------")

               If myProcess.Responding Then
                  Console.WriteLine("Status:  Responding to user interface")
                  myProcess.Refresh()
               Else
                  Console.WriteLine("Status:  Not Responding")
               End If
               Thread.Sleep(1000)
            End While

            Console.WriteLine()
            Console.WriteLine("Process exit code: {0}", myProcess.ExitCode)

         Catch e As Exception
            Console.WriteLine("The following exception was raised: " + e.Message)
         End Try
      End Sub 'Main
   End Class 'MyProcessClass
End Namespace 'Process_Sample


[C#] 
using System;
using System.Diagnostics;
using System.Threading;

namespace Process_Sample
{
   class MyProcessClass
   {
      public static void Main()
      {
         try
         {

            Process myProcess;
            myProcess = Process.Start("NotePad.exe");

            while(!myProcess.HasExited)
            {
               Console.WriteLine();

               // Get physical memory usage of the associated process.
               Console.WriteLine("Process's physical memory usage: " + myProcess.WorkingSet);
               // Get base priority of the associated process.
               Console.WriteLine("Base priority of the associated process: " + myProcess.BasePriority);
               // Get priority class of the associated process.
               Console.WriteLine("Priority class of the associated process: " + myProcess.PriorityClass);
               // Get user processor time for this process.
               Console.WriteLine("User Processor Time: " + myProcess.UserProcessorTime);
               // Get privileged processor time for this process.
               Console.WriteLine("Privileged Processor Time: " + myProcess.PrivilegedProcessorTime);
               // Get total processor time for this process.
               Console.WriteLine("Total Processor Time: " + myProcess.TotalProcessorTime);
               // Invoke overloaded ToString function.
               Console.WriteLine("Process's Name: " + myProcess.ToString());
               Console.WriteLine("-------------------------------------");

               if(myProcess.Responding)
               {
                  Console.WriteLine("Status:  Responding to user interface");
                  myProcess.Refresh();
               }
               else
               {
                  Console.WriteLine("Status:  Not Responding");
               }
               Thread.Sleep(1000);

            }

            Console.WriteLine();
            Console.WriteLine("Process exit code: {0}", myProcess.ExitCode);
         }
         catch(Exception e)
         {
            Console.WriteLine("The following exception was raised: " + e.Message);
         }
      }

   }
}

[C++] 
#using <mscorlib.dll>
#using <System.dll>

using namespace System;
using namespace System::Diagnostics;
using namespace System::Threading;

int main() {
    try {
        Process* myProcess;
        myProcess = Process::Start(S"NotePad.exe");

        while(!myProcess->HasExited)       
        {
           Console::WriteLine();

            // Get physical memory usage of the associated process.
            Console::WriteLine(S"Process's physical memory usage: {0}", myProcess->WorkingSet.ToString());
            // Get base priority of the associated process.
            Console::WriteLine(S"Base priority of the associated process: {0}", myProcess->BasePriority.ToString());
            // Get priority class of the associated process.
            Console::WriteLine("Priority class of the associated process: {0}", __box(myProcess->PriorityClass));
            // Get user processor time for this process.
            Console::WriteLine(S"User Processor Time: {0}", myProcess->UserProcessorTime.ToString());
            // Get privileged processor time for this process.
            Console::WriteLine(S"Privileged Processor Time: {0}", myProcess->PrivilegedProcessorTime.ToString());
            // Get total processor time for this process.
            Console::WriteLine(S"Total Processor Time: {0}", myProcess->TotalProcessorTime.ToString());
            // Invoke overloaded ToString function.
            Console::WriteLine(S"Process's Name: {0}", myProcess->ToString());
            Console::WriteLine(S"-------------------------------------");

            if (myProcess->Responding) 
            {
                Console::WriteLine(S"Status:  Responding to user interface");
                myProcess->Refresh();
            } 
            else
            {
                Console::WriteLine(S"Status:  Not Responding");
            }

            Thread::Sleep(1000);
        }

        Console::WriteLine();
        Console::WriteLine("Process exit code: {0}", myProcess->ExitCode.ToString());

    } catch (Exception* e) {
       Console::WriteLine(S"The following exception was raised:  {0}", e->Message);
    }
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows NT Server 4.0, Windows NT Workstation 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

Process Class | Process Members | System.Diagnostics Namespace | MinWorkingSet | MaxWorkingSet | PeakWorkingSet

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