How to remove finals 0's of decimal number?

Question

I'm using decimal to make and Physic calculator but I've noticed it keeps the finals 0's without taking out 0's in midle or being or before the "," of the result. For example:
275 M/s to KM/h
The Result is 990.
But the program shows 990,0.
I want make it show 990 instead of 990,0.

Answer 1

Please refer the link for more detailed explantion:http://developers.itextpdf.com/content/best-itext-questions-stackoverview/font-examples/itext7-how-use-system-font-itextsharp-vbnet

Answer 2

Dear Gokhul Sir, I have made this. Thank you. But I have another question. I have six buttons bearing same color. I want tab index position of button will show another color. Is it possible? Please help me.