Gets the strict mode version for the current scope

Get-StrictMode.ps1

function Get-StrictMode {
    [CmdletBinding()]
    param (
        [Switch]$All
    )

    [Reflection.BindingFlags]$flags = 'Instance, NonPublic'

    try {
        # SessionStateInternal
        $engineSessionState = [System.Management.Automation.SessionState].GetField('sessionState', $flags).
                                                                          GetValue($executioncontext.SessionState)
        
        # CurrentScope property of SessionStateInternal
        $sessionStateScope = $engineSessionState.GetType().GetProperty('CurrentScope', $flags).
                                                           GetValue($engineSessionState)

        $enumerator = [PowerShell].Assembly.GetType('System.Management.Automation.SessionStateScopeEnumerator').
                                            GetConstructor($flags, $null, $sessionStateScope.GetType(), $null).
                                            Invoke($sessionStateScope)

        foreach ($sessionStateScope in $enumerator) {
            # StrictModeVersion of SessionStateScope
            $version = $sessionStateScope.GetType().GetProperty('StrictModeVersion', $flags).
                                                    GetValue($sessionStateScope)

            if ($version) {
                $version

                if (-not $All) {
                    return
                }
            }
        }
    } catch {
        throw
    }
}