[CmdletBinding(SupportsShouldProcess)]param()

$local:allAliases = @()

$MyAliasScope = 0
$local:_scope = 0
$local:_done = $false
do {
  try {
    $local:newAliases += Get-Alias -Scope $_scope |
      Where-Object {
        ($_.Definition -match "^$MyPSScriptRoot") -or ($_.Description -match '#MyAlias')
      }
    if( $newAliases ) {
      $allAliases += $newAliases
      $MyAliasScope = $_scope;
      Write-Verbose "`$MyAliasScope is now set to $MyAliasScope"
    }
  } catch {
    Write-Verbose "catch: $($_.Exception.Message)"
    $_done = $_.Exception.Message -match 'The scope .* exceeds'
  }
  $_scope += 1
} until ( $_done )

$allAliases