underline the the whole text of pdf table using itextsharp.text.pdf in .net framework 3.5 and c#

I am开发者_如何学编程 creating a pdf table in my .net framework 3.5. I am trying to fully underline the text of my table like this:

Acc. Name Bank Acc. No. Address

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But I want the gap between the text and the line to be reduced because as soon as I add a new cell the gap increases.

And I want the output to be like this:

Acc. Name Bank Acc. No. Address

Please help me out on this.