Overcome Style Property

Problem:

                I have a Silverlight project that is created MVVM pattern. I have created many style with key and some kind of style what i am created Are global that target type such as Target Type="Silverlight Control". In this case i cannot overcome some property which is no need in my Page.  How can i solve this?

Solution:

                If you have a textbox style like below

You can write code by this syntax

<TextBox Margin="0"/>