Count is a property on arrays
PS> $x = 1..10
PS> $x.Count
10
The same information is available through Length (which is the property in the System.Array class definition)
PS> $x.Length
10
If the variable is a scalar you get 1 returned
PS> $x = 1
PS> $x.Count
1
With an empty array you get zero returned
PS> $x = @()
PS> $x.Count
0
This means that however many items are in the array you can safely check the number of items.
Be careful with strings as Count and Length give different results
PS> $x = ‘asdfghjkl;’
PS> $x.count
1
PS> $x.length
10
If you want to test the number of elements returned use Count rather than length
under: PowerShell