using System;

using System.Linq;

​

var inputs = new double[] { 234, 234, 356, 465, 546, 766, 233 };

var scaler = new MinMaxScaler();

var outputs = scaler.Scale(inputs);

​

Console.WriteLine(outputs);

​

public interface IScaler

{

    double[] Scale(double[] inputs);

}

​

public sealed class MinMaxScaler : IScaler

{

    public double[] Scale(double[] inputs)

    {

        if (inputs == null || inputs.Length == 0)

            throw new ArgumentOutOfRangeException(nameof(inputs));

        var (min, max) = MinMax(inputs);

        var range = max - min;

        return inputs.Select(current => (current - min) / range).ToArray();

    }

    private static (double, double) MinMax(double[] inputs)

    {

        var min = inputs[0];

        var max = inputs[0];

        for (var index = 1; index < inputs.Length; ++index)

        {

            if (inputs[index] < min)

                min = inputs[index];

            else if (inputs[index] > max)

                max = inputs[index];

        }

        return (min, max);

    }

}