using System;

​

​

public class Program

{

    public static void Main()

    {

        float floatVal = 2.999995f;

        string str=floatVal.ToString();

        if(str.Split('.')[1].Length > 3)

             floatVal=Convert.ToSingle(str.Substring(0,str.IndexOf('.')+5));

​

        Console.WriteLine(floatVal);

    }

}