Get all parameters to function, including default values

Get-AllBoundParameters.ps1

Function Get-AllBoundParameters {
    [CmdletBinding()]
    Param(
        # A simple string parameter that is mandatory
        [Parameter(Mandatory)]
        [String]
        $Name,

        # A simple switch
        [Parameter()]
        [Switch]
        $Switch,
        
        # A parameter with a default value
        [Parameter()]
        [String]
        $DefaultValue = 'A default'
    )

    end {
        $params = $PSCmdlet.MyInvocation.BoundParameters

        $PSCmdlet.MyInvocation.MyCommand.Parameters.Keys | ForEach-Object {
            if (-not $params.ContainsKey($_)) {
                $params[$_] = (Get-Variable -Name $_ -Scope 0 -ErrorAction SilentlyContinue).Value
            }
        }
        
        $params
    }
}