Accessing object property as string and setting its value

I have an instance of the Account class. Each account object has an owner, reference, etc.

One way I can access an accounts properties is through accessors like

account.Reference;

but I would like to be able to access it using dynamic string selectors like:

account["PropertyName"];

just like in JavaScript. So I would have account["Reference"] which would return the value, but I also would like to be able to assign a new value after that like:

account["Reference"] = "124ds4EE2s";

I've noticed I can use

DataBinder.Eval(account,"Reference") 

to get a property based on a string, but using this I can't assign a value to the property.

Any idea on how I could do that?