Save formulas to a file

[marcnoon]

Is your feature request related to a problem? Please describe.
Save and retrieve equations and verify they continue to function and produce a plot consistently.

Describe the solution you'd like
Once a formula is setup it should be stored.
The formulas should also be retrieved from the file system via a file dialog.

Describe alternatives you've considered
After loading a file it should plot the correct plot for that file and formula. Since each formula is stored by that name it should match the formula that was created when that formula was saved.

Additional context
This is the first step before creating a feed of formulas on the internet from a web service or a restful web api.

[marcnoon]

This is not possible the way its setup now. I need to re-think this process so its possible to add functions and plot them from many different sources. Since its in a dictionary and stores annonymous functions it will be difficult or impossible to save the object and convert or serialize into a memory stream object. However, there are many other routes that can solve this problem by using a better system of storing equations or formulas. Right now I'm having difficulty coming up with something other than converting these func anonymous functions and breaking them down into the functionality machinery that renders down to value types. Unfortunately with regard to function or complex equations this will not be very fun. I wish there was a simple way to store a dictionary<string, func<...>>.