How to set CSS style value from code-behind?

I have developed my aspx page and I need that page width should be adjusted as per the requirement, i read regarding this issue in some blogs that this is possible through the code behind and i also read that this will be edited with the help of <DIV /> tag and then we need to add an ID value to it, but don't know how to implement it in real life.

Thanks

I will provide you the C# code that will help you much more easier to setup your problem from the code-behind.

Code:

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myDiv.attributes.Add("Style", "width:1000px;margin:0px auto")

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This i have used as an simple outline to implement using the CSS style sheet, i am not providing you my code this is because that code would be different from yours but this will give you the better idea to do so.

Yes you will require to use <DIV /> and also need to Use Style collection:
myDiv.Style["width"]="200px";

and if we are concerning about the <DIV /> then you need to replace the <div> with an <asp : Panel>. and It will help to produce the same html output but will give you better choice of server-side properties.