C# exception filter?

Question

Does C# support compiling filters? How do filters even work or what do they do?

Like reflector decompiles a filter as

try
{
}
catch(Exception e) when (?)
{         


        

Answer 1

Since C# 6 you can now do this.

try { … }
catch (MyException e) when (myfilter(e))
{
    …
}

This is different from using an if statement from within the catch block, using exception filters will not unwind the stack.