[C#] Rotation to direction

public static Vector3 RotationToDirection(Vector3 Rotation)
{
    float z = Rotation.Z;
    float num = z * 0.0174532924f;
    float x = Rotation.X;
    float num2 = x * 0.0174532924f;
    float num3 = Math.Abs((float)Math.Cos((double)num2));
    return new Vector3
    {
        X = (float)((double)((float)(-(float)Math.Sin((double)num))) * (double)num3),
        Y = (float)((double)((float)Math.Cos((double)num)) * (double)num3),
        Z = (float)Math.Sin((double)num2)
    };
}