[C#] Gleitkommazahlen richtig vergleichen

• Quelle: Link

using System;

/// <summary>
/// freeware helper class for little math problems
/// (W) 2014 by admin of codezentrale.6x.to
/// </summary>
public static class MathTools
{
    /// <summary>
    /// Epsilon for float comparision
    /// </summary>
    public const float EPSILON_FLOAT = 1.192093E-07f;
    /// <summary>
    /// Epsilon for double comparision
    /// </summary>
    public const double EPSILON_DOUBLE = 2.22044604925031E-16;

    /// <summary>
    /// Gleitkommavergleich für float
    /// </summary>
    /// <param name="f1"->1. Zahl</param>
    /// <param name="f2"->2. Zahl</param>
    /// <returns>true, wenn gleich</returns>
    public static bool FloatIsEqual(float f1, float f2)
    {
        return (Math.Abs(f1 - f2) < EPSILON_FLOAT);
    }
    /// <summary>
    /// Gleitkommavergleich für double
    /// </summary>
    /// <param name="d1"->1. Zahl</param>
    /// <param name="d2"->2. Zahl</param>
    /// <returns>true, wenn gleich</returns>
    public static bool DoubleIsEqual(double d1, double d2)
    {
        return (Math.Abs(d1 - d2) < EPSILON_DOUBLE);
    }
}