How do I tell if a type is a “simple” type? i.e. holds a single value

Question

typeof(string).IsPrimitive == false
typeof(int).IsPrimitive == true
typeof(MyClass).IsClass == true
typeof(string).IsClass == true
typeof(string).IsByRef == false
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Answer 1

It may not matter, but it sounds like you're leaving out a few cases:

1. Complex types which have conversions
2. Value types which don't have a parameterless constructor. Example below:

There are probably more, but I think you're partitioning the problem space in an overly-restrictive manner.

 public class Person {
    private string _name;
    private int _age;
    public Person(string name, int age) {_name = name; _age = age;}
    // Remainder of value implementation
 }