Given a list with some duplicate items, I can use Group-Object -AsHashtable and I get a hash table that seems to have keys with the item names, and the value is something I don't recognize.

So, given

$array = [System.Collections.Generic.List[String]]@('A', 'B', 'C', 'B', "c", 'C')
$grouped = $array | Group-Object -AsHashTable

$grouped will be

Name                           Value                                                                                                                                                                                                                                              
----                           -----                                                                                                                                                                                                                                              
A                              {A}                                                                                                                                                                                                                                                
B                              {B, B}                                                                                                                                                                                                                                             
C                              {C, c, C}  

At which point I would have thought that $grouped['B'].Count or $grouped.'B'.Count would produce the correct count of 2. But I am getting 0. What am I missing?

CodePudding user response：

You're seeing a bug in Windows PowerShell that has since been fixed in PowerShell (Core) 7 - see