I work on developing application using winforms in C#. While developing, I want to use many small methods e.g. resetPerticularCombo(), so the code remains as clean as possible. But the problem is making methods for 3-5 lines of code could lead to too many method calls, I have heard that while compiling Visual Studio 2008 takes care of this thing using code inlining.
My query is that, should I rely on this feature and go ahead with the usage of small helper methods or I should use inlining myself?
You shouldn’t worry about having large number of method calls until you’ve proved that it’s a problem. It’s very unlikely (IMO) that this will actually cause an issue, and if it gives you more readable code, that’s the most important thing.
But test the performance all the time to see whether it’s acceptable. Find out where the bottleneck in your code is, whether by profiling or other techniques, and consider micro-optimizing just at the points where it’ll make the most difference.
In my experience micro-optimizing at the “use fewer methods” sort of level is almost always pointless compared with higher level changes (e.g. going from a list lookup to a dictionary lookup, etc).