Result of the IEnumerable.Count() function may be wrong. This is a very simple sample to test:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Collections;
namespace Test
{
class Program
{
static void Main(string[] args)
{
var test = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 };
var result = test.Split(7);
int cnt = 0;
foreach (IEnumerable<int> chunk in result)
{
cnt = chunk.Count();
Console.WriteLine(cnt);
}
cnt = result.Count();
Console.WriteLine(cnt);
Console.ReadLine();
}
}
static class LinqExt
{
public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> source, int chunkLength)
{
if (chunkLength <= 0)
throw new ArgumentOutOfRangeException("chunkLength", "chunkLength must be greater than 0");
IEnumerable<T> result = null;
using (IEnumerator<T> enumerator = source.GetEnumerator())
{
while (enumerator.MoveNext())
{
result = GetChunk(enumerator, chunkLength);
yield return result;
}
}
}
static IEnumerable<T> GetChunk<T>(IEnumerator<T> source, int chunkLength)
{
int x = chunkLength;
do
yield return source.Current;
while (--x > 0 && source.MoveNext());
}
}
}
Result must be (7,7,3,3) but actual result is (7,7,3,17)