Why aren't variables declared in “try” in scope in “catch” or “finally”?

Question

In C# and in Java (and possibly other languages as well), variables declared in a \"try\" block are not in scope in the corresponding \"catch\" or \"finally\" blocks. For e

Answer 1

My thought would be that because something in the try block triggered the exception its namespace contents cannot be trusted - ie referencing the String 's' in the catch block could cause the throw of yet another exception.