Confused with Winform UI (Sizing and spacing)

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C#3.0

C#

Hi All,

I am developing a windows application and I am very much confused with the winform UI (Sizing and control placement).
The problem I am facing is with size of forms, I have used MDI form whose size is set to 1024*734 that fits in my laptop screen
I created a UserMaster form but when the main form(MDI) is maximized lots of blank space is left over as there are not many controls

My screen resolution is 1366*768, but my application will be used on desktops as well as laptops

Is there any Industrial Practice or standards for windows application UI

I am developing on C#

Thanks in advance
Siddhesh