.NET Resource Management - Effective C# - page 118

private set ;
}
public string State
{
get ;
private set ;
}
public int ZipCode
{
get ;
private set ;
}
}
Now you have an immutable type, based on the public interface. To make
it useful, you need to add all necessary constructors to initialize the Address
structure completely. The Address structure needs only one additional
constructor, specifying each field. A copy constructor is not needed
because the assignment operator is just as efficient. Remember that the
default constructor is still accessible. There is a default address where all the
strings are null, and the ZIP code is 0:
public Address2( string line1,
string line2,
string city,
string state,
int zipCode) :
this ()
{
Line1 = line1;
Line2 = line2;
City = city;
ValidateState(state);
State = state;
ValidateZip(zipCode);
ZipCode = zipCode;
}
Using the immutable type requires a slightly different calling sequence to
modify its state. You create a new object rather than modify the existing
instance: