using System;

using System.Collections.Generic;

using System.Collections;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var rnd = new Random();

        var startDate = DateTime.Now;

        var data = Enumerable.Range(0, 121).Select(i => new KpiMerma

                                        {

                                            ProductionLineId = 2,

                                            CreatedOn = startDate.AddMinutes(1),

                                            KpiValue = Math.Round((rnd.NextDouble() * 0.2 + 0.7), 2)

                                        }).ToList(); 

        var list = data.FindConsecutiveGroups<KpiMerma>((x) => x.KpiValue > 0.3, 30);

        Console.WriteLine(list.Count());

        foreach(var merme in list)

        {

            Console.WriteLine(merme.ToString());

        }

    }

}

​

public class KpiMerma

{

    public int ProductionLineId { get; set; }

    public DateTime CreatedOn { get; set; }

    public double KpiValue { get; set; }

    public override string ToString()

    {

        return "Linea " + ProductionLineId + " Creada el " + CreatedOn.ToString("dd/MM/yyyy HH:mm:ss") + " con kpi " + KpiValue;

    }

}

​

public static class Extensions

{

    public static IEnumerable<IEnumerable<T>> FindConsecutiveGroups<T>(this IEnumerable<T> sequence, Predicate<T> predicate, int count)

    {

        IEnumerable<T> current = sequence;

​

        while (current.Count() > count)

        {

            IEnumerable<T> window = current.Take(count);

​

            if (window.Where(x => predicate(x)).Count() >= count)

                yield return window;

​

            current = current.Skip(1);

        }

    }

}