Links

// Create Index
http://stackoverflow.com/questions/16853909/create-database-index-with-entity-framework

// Overload operator
http://www.tutorialspoint.com/csharp/csharp_operator_overloading.htm

// Custom conversion???
https://csharp.2000things.com/tag/custom-conversion/

// Lambda expression
http://stackoverflow.com/questions/3492856/entity-framework-writing-query-using-lambda-expression

// LINQ
https://msdn.microsoft.com/en-us/library/bb738645(v=vs.110).aspx