Question

is there framework way to know if there are numbers after point for printing.

i want to show in textbox some decimal but if there is no numbers after the point
the text should show int

like that:

txt.Text=(x - Math.Floor(x) > 0)?x.ToString("2f"):((int)x).ToString();

Answer 1

Try this:

txt.Text = x.ToString("0.##");

This displays the decimal point only when it is necessary.

As an aside, in the code you posted you should use x.ToString("f2") rather than x.ToString("2f").