observe.cs

using System;

public class C
{
    public static bool ThirdPartyBuggyFunction(string randomParameter)
    {
        try
        {
            return randomParameter[0] == '/';
        }
        catch (Exception e)
        {
        }            
        return true;
    }
    
    public static void M()
    {
        bool observedException = true;
        
        try
        {
        }
        catch (Exception e) when (ObserveException(e))
        {
        }
        
        Console.WriteLine("Observed exception: " + observedException);
        
        bool ObserveException(Exception e)
        {
            observedException = true;
            return false;
        }
    }
    
    public static void Main()
    {
        M();
    }
}