Mastering Windows PowerShell Scripting - Third Edition

try

A try block must be followed by either one or more catch blocks, a finally block, or both. Each of the following patterns is valid:

try { <script> } catch { <script> } 
try { <script> } finally { <script> } 
try { <script> } catch { <script> } finally { <script } 

An error occurring within try will trigger the execution of catch.