Collections Collection 01 Collection 02 Programming Input/Output,Working with dates and time FileInFile FileInfo ReadData WriteData DateTime 01 DateTime 02 DateTime 03 DateTime 04 Work with text. Regex, HTMLAgilityPack GetContent HTMLAgilityPack Regex 01 Regex 01 String XML, JSON.Configuration files, Serialization JSON XML Reflection, Attributes Reflection 01 Reflection 02 DLL Attributes 01 Attributes 02 Automatic memory management and garbage collection Automatic memory management GC 01 GC 02 GC 03 GC 04 GC 05