using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        new ParameterArray<int[], int>(new int[] {1,2,3}, 5, 9);

    }

    public class ParameterArray<TEnumerable, TType> //: IParameterArray<TEnumerable, TType> 

        where TEnumerable : class, ICollection<TType>    // Note that I have tried with IEnumerable<TType> instead of ICollection<TType>, but did not really help

    {

        TType MaxValue;

        TType MinValue;

        public ParameterArray(TEnumerable value, TType minValue, TType maxValue)

        {

            MinValue = minValue;

            MaxValue = maxValue;

            Value = value;

         }

​

        private TEnumerable _value;

        public TEnumerable Value

        {

            get => _value;

            set

            {

               ICollection<TType> ckeckedValue = default;

​

               // Here I want to check the range before setting the value

               // Note that Value can be of type int[], float[], bool[], byte[]

​

               // I have tried many work around, but for some reasons, I am never able to update _value

               for (int idx = 0; idx < value.Count(); idx++)

               {

                   // Backup value after range limiting

                   ckeckedValue.Add(CheckRange(value.ElementAt(idx)));

                }

​

                // Would like to save these new values in _value, but not sure how to

                _value = ckeckedValue as TEnumerable;     // !!! Breaking here at runtime - Cannot convert from one type to the other

            }

        }

​

        public TType CheckRange(TType value)

        {

            TType retValue = value;

​

            if (value != null)

            {

                // Restrict range to Min/Max

                if (Comparer<TType>.Default.Compare(MaxValue, value) < 0)

                    retValue = MaxValue;

                else if (Comparer<TType>.Default.Compare(MinValue, value) > 0)

                    retValue = MinValue;

            }

            else

            {

                throw new ArgumentOutOfRangeException($"Value cannot be null: Range is {MinValue} to {MaxValue}");

            }

​

            return retValue;

        }

    }

}