This helper library will be useful for you no matter what kind of project you are developingon. It is in all one project. There are tons of extensions and helper methods included in the project. All source codes are included. You can modify or add new extensions/helpers as you wanted.

Main categories of helper methods

Cache : This generic helper will let you cache any object.
Collections : ByteArrayExtensions, CollectionExtensions, DictionaryExtensions, EnumerableExtensions, LinqExtensions, SyncedCollection
Converters: BooleanConverter, DatemtimeConverter, EnumerableConverter,NullableConverter
Data: ConversionExtensions, DataReaderExtensions, DateTimeExtensions, EntityHelper, EnumExtensions, GroupByExtensions, MiscExtensions, NumericExtensions, RegexExtensions, StreamExtensions, StringExtensions, TypeExtensions, XmlExtensions, XPathExtensions
Encryptor
File : DirectoryExtensions, FileHelper, PathHelper
ImageManager : ResizeImage, CreateImage, GenerateImageFromFile, GenerateGifImageFromFile, GenerateImageFromStream, AddWaterMark, CropImage, RotateImage
Html : HtmlHelper, HtmlUtils, WebRequestHandler
Http :SafeGetHttpRequest, GetOrAdd, IsHtmlViewResult, GetItem, GetSubDomain
Json : Json Handler is a great helper to handle api reuqest for json results.
Email : Mail helper.
Useful models : ConcurrentMultipMap, LazyMultiMap, MultiMap,QueryString,SyncedCollection,TrimmedBuffer
Handy Utils : BitHelpers,CommonHelper,RegularExpressions,SerializationUtils,Singleton,Utils, XmlHelper

C#.Net & .Net Core Helper For All Projects