Runspace.Open Method ()


Updated: April 27, 2016

Applies To: Windows PowerShell

Opens the runspace synchronously, creating a Windows PowerShell execution environment.

Namespace:   System.Management.Automation.Runspaces
Assembly:  System.Management.Automation (in System.Management.Automation.dll)

public abstract void Open()

Exception Condition

The runspace is not in the BeforeOpen state.

When opening the runspace, the runspace configuration is used to determine whether any initialization is required.

To find out the state of the runspace, use the RunspaceStateInfo property.

The runspace can also be opened asynchronously. See the OpenAsync class.

For more information about runspaces and runspace pools, see Host Application Runspaces.


The user at the command line may not necessarily realize that the commands that Windows PowerShell runs are being processed within a runspace. From the command-line user’s point of view, commands are run in a Windows PowerShell session. From a host application’s point of view, commands are run within a runspace.

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