Point being that it's easy to write a script that works fine on v3/4 but fails when run on v2, without doing something incredibly obvious like using cmdlets or

Point being that it's easy to write a script that works fine on v3/4 but fails when run on v2, without doing something incredibly obvious like using cmdlets or modules that didn't ship with v2. Here is a by-no-means-comprehensive list of potential gotchas: • Operation Statements vs Script Blocks • Several new operators • Changes to $PSScriptRoot and $MyInvocation • Stop parsing symbol --% • Ordered dictionaries • New redirection operators • Count and Length properties added to "arrays" of zero or one • Retrieving a property from a collection that only exists in the individual items returns the value from all items. • BadNumericConstant