C# LINQ - Partitioning the List Collection Into Chunks

Partitioning is the key part while working with the large collections in programming. LINQ helps in dividing the huge collection into chunks. 

Below code snippet takes the list and the chunk size and yields the chunks from the collection.

public static IEnumerable<List<T>> Partition<T>(List<T> source, Int32 size)

{

    for (int i = 0; i < Math.Ceiling(source.Count / (Double)size); i++)

        yield return new List<T>(source.Skip(size * i).Take(size));

}

Test Results:

C# - Read AppSettings / Configuration Settings from File

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

/// <summary>
/// Reads the app settings kyes information for the provided keys
/// </summary>
/// <param name="filePath"></param>
/// <param name="keysToRead"></param>
/// <returns></returns>
private Dictionary<string, string> ReadAppSettings(string filePath, IEnumerable<string> keysToRead)
{
    JObject appsettingsInfo = JsonConvert.DeserializeObject<JObject>(File.ReadAllText(filePath));
        return appsettingsInfo.Root.Values().
                        Select(item => new { Key = item.Path, Value = item.Value<string>() }).
                        Where(item => keysToRead.Contains(item.Key, StringComparer.InvariantCultureIgnoreCase)).
                        Select(item => new KeyValuePair<string, string>(item.Key, item.Value)).ToDictionary(x => x.Key, x => x.Value);
}

C# - LINQ - How to Group List and Convert to Dictionary

 Dictionary<string, List<EmployeeDetails>> result = employeeInfo
                    .GroupBy(empInfo => empInfo.EmployeeName)
                    .ToDictionary(empInfo => empInfo.Key, empInfo => empInfo.ToList());