as a beginner how to have good command on windows app devlopment

If you wanna go for Windows Form apps then you can refer:
http://msdn.microsoft.com/en-us/library/ms229601(v=vs.110).aspx

if you wanna go for WPF then:
http://msdn.microsoft.com/en-us/library/ms754130(v=vs.110).aspx

i' m talking about windows app development through microsoft visual studio c# .net (client appliction), desktop app 
msdn 9 channel is about developing store apps , which is not my question , thank you fr reply

go through msdn channel19 ...!
:)