Why does it not allowed to use try-catch statement without {}?

Question

Why can't I use code like this ?

1

int i = 0;

try i = int.Parse("qwerty");
catch throw;

2

try i = int.Parse("qwerty");
catch;
finally Log.Write("error");

And should write like this

1

int i = 0;

try { i = int.Parse("qwerty"); } catch { throw; }

2

try { i = int.Parse("qwerty");}
catch {}
finally {Log.Write("error");}

PS:

I can use if-else statement without {}. Why should I use them with try-catch(-finally) statement ? Is there any meaningful reason ?

Is it only because that some people think that code is hard to read ?

Several months ago I asked that question on russian programming forum but I got no satisfactory answer ...

Answer 1

That's what the language designers decided.

In either case, even a single line if is dangerous - people add lines expecting them to be included in the if, which of course, as they are not in {}, they are not.

Answer 2

C# probably made the braces a requirement because C++ did. My guess as to why they're required in C++ is that it makes it easier to write nested and multiple catch blocks without making mistakes. The braces add an extra level of scope, which can be convenient, but I can't think of a reason why it would be required.