How to list fields of current class in C# Reflection (problem with this.GetType())?

Question

This is accepted by the compiler:

FieldInfo[] fieldInfos;
fieldInfos = typeof(MyClass).GetFields(BindingFlags.NonPublic | BindingFlags.Instance);

This is NOT accepted by the compiler:

FieldInfo[] fieldInfos;
fieldInfos = typeof(this.GetType()).GetFields(BindingFlags.NonPublic | BindingFlags.Instance);

How to fix second syntax?

Answer 1

You don't need typeof() around a GetType call since it already returns a Type object. typeof is a special syntax for getting a Type object from a type name, without having to do something like Type.GetType("Foo").

FieldInfo[] fieldInfos;
fieldInfos = GetType().GetFields(BindingFlags.NonPublic |
                                 BindingFlags.Instance);

Answer 2

typeof does not permit you to pass in an instance of System.Type. typeof is an operator whose sole parameter is a type (like Int32, or object, or MyClass) and it returns an instance of System.Type. When you already have an instance of an object, just call GetType so get an instance of System.Type. Therefore, just say

fieldInfos = this.GetType()
                 .GetFields(BindingFlags.NonPublic | BindingFlags.Instance);