using System;

using System.Linq;

using UnitsNet;

​

public class Program

{

    public static void Main()

    {

        var count = 6;

        var start = Length.FromInches(0.75);

        var step = Length.FromInches(0.25);

        var lengths = Enumerable.Range(0, count).Select((_, i) => start + step * i);

        var options = lengths.Select(length => new

        {

            Label = length.ToString(),

            Value = length

        });

​

        foreach (var option in options)

        {

            Console.WriteLine(option);

        }

    }

}