using System;
using System.Linq;

public class Test
{
    public static void Main()
    {
        // build sample data with 1200 Strings
        string[] items = Enumerable.Range(1, 1200).Select(i => "Item" + i).ToArray();
        // split on groups with each 100 items
        String[][] chunks = items
                    .Select((s, i) => new { Value = s, Index = i })
                    .GroupBy(x => x.Index / 100)
                    .Select(grp => grp.Select(x => x.Value).ToArray())
                    .ToArray();

        for (int i = 0; i < chunks.Length; i++)
        {
             foreach (var item in chunks[i])
                Console.WriteLine("chunk:{0} {1}", i, item);
        }
    }
}