Test multiple logs for different event sources that may or may not be in the registry keys

Test-EventSourceByLog.ps1

function Test-EventSourceByLog {
    <#
    .SYNOPSIS
        This tests for multiple sources in multiple eventlogs
    
    .DESCRIPTION
        This works regardless of if it exists directly in registry or not.
        This is different than the Test-EventSource which uses a dotnet function 
        to check for all the sources that are directly listed in the registry.
    
    .PARAMETER EventSource
        The list of eventsources to check
    
    .PARAMETER LogName
        The list of eventlogs to check
    
    .EXAMPLE
        PS C:\> Test-EventSourceByLog -EventSource gupdate,egdgeupdate,drftesting -LogName Application

        Name        Log         Exists
        ----        ---         ------
        gupdate     Application   True
        egdgeupdate Application  False
        drftesting  Application  False
    
    .EXAMPLE
        PS C:\> Test-EventSourceByLog -EventSource gupdate,egdgeupdate,'service control manager' -LogName Application,System

        Name                    Log         Exists
        ----                    ---         ------
        gupdate                 Application   True
        egdgeupdate             Application  False
        service control manager Application  False
        gupdate                 System       False
        egdgeupdate             System       False
        service control manager System        True
        
    .NOTES
        The primary functional code came from Santiago Squarzon (https://github.com/santisq)
        
    #>
    param(
        [parameter(Mandatory,ValueFromPipelineByPropertyName,ValueFromPipeline)]
        [string[]]$EventSource,

        [parameter(Mandatory, ValueFromPipelineByPropertyName, ValueFromPipeline)]
        [string[]]$LogName
    )

    foreach ($Log in $LogName) {
        foreach ($Source in $EventSource) {
            $SourceLog = $Log                
            try {
                $filter = "*[System/Provider/@Name='$Source']"
                $reader = [System.Diagnostics.Eventing.Reader.EventLogReader]::new(
                    [System.Diagnostics.Eventing.Reader.EventLogQuery]::new(
                        $Log,
                        [System.Diagnostics.Eventing.Reader.PathType]::LogName,
                        $filter))
                $SourceFound = $reader.ReadEvent() -as [bool]
            }
            finally {
                if ($reader) { $reader.Dispose() }
            }
            [PSCustomObject]@{
                Name            = $Source
                Log             = $SourceLog
                Exists          = $SourceFound
            }
        }
    } 
}