uto,
It seems like you want a floor function. There is nothing like this in
..NET which can do this for you, but it is easy enough to program.
public static double Floor(double value)
{
// Just return the overload.
return Floor(value, 0);
}
public static double Floor(double value, int digits)
{
// Check here to see if digits is negative.
// Get the amount to subtract from value. Generally, if you are
rounding
// to 0 places, then you would subtract .5, and round normally. If to
// 1 place, then subtract .05, etc, etc.
int powerOfTen = Math.Pow(10, digits);
// Now subtract, and round.
return Math.Round(value  (.5 * powerOfTen), digits);
}
Hope this helps.

 Nicholas Paldino [.NET/C# MVP]

mv*@spam.guard.caspershouse.com
"uto" <so**********@gmail.com> wrote in message
news:Oe**************@TK2MSFTNGP11.phx.gbl...
i'd like to trancate like this.
1.555 => 1
2.6655 = > 2
0.901923 = > 0
and
1.56 => 1.5
1.34 => 1.3
1.99 => 1.9
how can i do this in c#