Sharing state across different runspaces using a shared variable

Sharestate.ps1

# Sharing state across different runspaces using a shared variable 
# Expirmenting with Boe's stuff
# http://learn-powershell.net/2013/04/19/sharing-variables-and-live-objects-between-powershell-runspaces/

# Create a synhronized HashTable which will be shared across different runspaces      
$hash = [hashtable]::Synchronized(@{})
$hash.one = 1

# You can also create a non-synchronized hashtable, and that will work too. (i.e. Can be used to share state across runspaces)
$hash = [hashtable]::new()
$hash.one = 1

# Runspace One
$rs1 = [System.Management.Automation.Runspaces.RunspaceFactory]::CreateRunspace()
$rs1.open()
$rs1.SessionStateProxy.SetVariable('Hash',$hash)

# Powershell Instance One
$ps1 = [powershell]::Create()
$ps1.runspace = $rs1
$ps1.AddScript(
{$hash.one++}
)

# ScriptBlock which will execute the PS Instance ONE
$sb1 = { 
$hash.one
$ps1.BeginInvoke()
}


# Runspace Two
$rs2 = [System.Management.Automation.Runspaces.RunspaceFactory]::CreateRunspace()
$rs2.open()
$rs2.SessionStateProxy.SetVariable('Hash',$hash)

# Powershell Instance Two
$ps2 = [powershell]::Create()
$ps2.runspace = $rs2
$ps2.AddScript(
{$hash.one++}
)

# ScriptBlock which will execute the PS Instance TWO
$sb2= { 
$hash.one
$ps2.BeginInvoke()
}

# Hash Value Before executing the PS Instance
$hash.one

# Call the scriptblock ONE, which executes Instance PS1 for RS1
& $sb1
$hash.one

# Call the scriptblock TWO, which executes Instance PS2 for RS2
& $sb2
$hash.one