sumit wrote:... made the CSS successfully.
But when i go to style drop down list i dont find my CSS file ( Screen.CSS) listed there.
If I understand you properly, you have created a CSS file and put it in the CSS directory... When you go to Settings tab in the Umbraco backend, and expand Stylesheets, do you see your CSS?
If not, I suggest you select-all and copy the content of your CSS, then go to the Settings tab, right-click the Stylesheets node, select create, type your css name (Screen), then Paste your CSS content. Save, and you're done.
HOWEVER
On reading my own instructions, I can see a potential error that you might have made. In Umbraco, when you create a stylesheet (or xsl, or whatever) it automatically appends the file extension. If you add the extension yourself (Screen.CSS) then the file that will actually be saved is "Screen.CSS.css". Click on your Screen.CSS, and give it a new name (without the css) then click save.
Hope that works!
Dekker
www.WoodworkDetails.com