System.Random.NextDouble C# (CSharp) Method

      public virtual double NextDouble() {
        return Sample();
      }
    

        public Pigeon(ContentManager con)
        {
            boundingBox = new Vector3(6, 3, 6);

            distance = 0;
            rand = new Random();

            dx = (0.5-rand.NextDouble())*0.8 + 0.2;
            dy = rand.NextDouble()*1.5 + 0.7;
            dz = 0.8;

            x = 5.8;
            y = -2;
            z = 83.5;

            sx = 5.8;
            sy = -2;
            sz = 83.5;

            this.world = Matrix.CreateTranslation(new Vector3((float)x, (float)y, (float)z));

            model = con.Load<Model>(@"models/pigeon");

            isDone = false;
        }