Expression-Bodied Members
Expression body definitions are a concise form of implementing a member.
usage
member => expression;
use in methods
Commonly used in types that override the ToString method:
public override string ToString() => $"{fname} {lname}".Trim();
use in read only properties
public class Location {
    private string locationName;
    public Location(string name) 
    {
        locationName = name;
    }
    public string Name => locationName;
}
use in constructors and properties
public class Location 
{
    private string locationName;
    public Location(string name) => Name = name; // Assigns argument name to property Name.
    public string Name 
    {
        get => locationName; // Equivalent to get { return locationName; }
        set => locationName; // Equivalent to set { locationName = name } = value;(?)
    }
}