Some years ago I read Damian Conway's Perl Best Practices. Here's a link below
Perl Best Pracices on Google Books
There's a whole chapter there dealing with Code Layout. All my feelings about code layout are summed up in his writing. I highly recommend that chapter. It can be easily applied to C#.
I've been trying to stick to his rules for whatever language I might be using : C#, Java, Perl, JavaScript, VBScript, VB, PHP,...
In this book, Conway suggest to use 78-column lines. I've got to admit I broke the rule and sticked to 80 but I think it's OK.
I've integrated this rule to every editor I use (Notepad++, Komodo, Vi, Vim, Visual Studio 2005) in order to have a visual guideline showing this limit.
Some of you might wonder how to show a guideline on VS, huh?
Well I found it to be not so obvious. In fact, you have to actually create a string parameter in the registry. Here's a post I found on SO about it. Hope it helps.
Adding a guideline to the editor in Visual Studio
