Expression Tree

Sometimes you may need to break an expression into heirarichal form , for example to convert an infix exp to postfix expression or evaluate something in a specific order, for all such problems you can use expression tree.

In c# we have Expression Class to create a expression tree which takes delegate so you can pass lambda expressions to it.

Alternatively like c++ you use stack and Queue , please go through the MSDocs

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/expression-trees/