Method that return a query from a query in argument

Presentation

I have a ContactProfileModel entity class with some properties :

• FirstName
• LastName
• BirthDate etc..

I have other Entities who have a ContactProfileModel foreignkey. Example : RegistrationModel.Contact.

Needs

I would like to create a method whith the Following signature :

public static Expression<Func<TModel, string>> Contact<TModel>(Expression<Func<TModel, ContactProfileModel>> contact)

And use it this way :

DisplayQuery.Contact<RegistrationModel>(m => m.ContactProfile))

Objective

The objective is to return a linq query where result is a string and contains different informations of the contact. Example : "John Doe (10/10/90)"

Note

I have discussed with some people who told me to use Expression.Call and Expression.Property but unfortunatly I do not have enough knowledge to use it properly.

Here I expose my problem without extra details, but I have my reasons to create my method only this way.

Thanks in advance.