Calculate is an independent class library that allows you to provide extensive calculation support to your business objects. Also, it provides support to parse and evaluate expressions or formulas with 400+ predefined functions. Some of the key features are below: * Parses and evaluates Excel-based formulas and equations. * Named ranges, dynamic references, array formulas, and formula dependencies are supported. * Supports cross-sheet references (can work with multiple sheets). * Supports custom functions with n-number of optional arguments. * Culture-sensitive decimal separator and argument separator. * It also supports Indexer method for calculation.