This is table of contents for Building Expression Evaluator with Expression Trees in C# series. We are going to build a simple mathematical expression evaluator in C# using expression trees. The library supports simple expressions such as `2.5+5.9`

, `17.89-2.47+7.16`

, `5/2/2+1.5*3+4.58`

, expressions with parentheses `(((9-6/2)*2-4)/2-6-1)/(2+24/(2+4))`

and expressions with variables:

var a = 6;
var b = 4.32m;
var c = 24.15m;
Assert.That(engine.Evaluate("(((9-a/2)*2-b)/2-a-1)/(2+c/(2+4))", a, b, c),
Is.EqualTo((((9 - a / 2) * 2 - b) / 2 - a - 1) / (2 + c / (2 + 4))));

At the end of the series full source code ~~will be available at github~~ and the library will be published to NuGet.

Source code is available at github: Math-Expression-Evaluator

### Table of Contents

- Building Expression Evaluator with Expression Trees in C# – A basic implementation.
- Building Expression Evaluator with Expression Trees in C# – Adding support for parentheses.
- Building Expression Evaluator with Expression Trees in C# – Adding support for variables.
- Building Expression Evaluator with Expression Trees in C# – Improving the Api