CODEWITHSUNDEEP
c#reflection
zappasan
zappasan

Reputation: 82

Which relation between Type.GetProperty and a readonly field

I've got the following class:

public sealed class ImmutableObject {

         public readonly int ic;

         public ImmutableObject(int value) {
             ic = value;
         }
}

Then I created a method that tries to obtain reflection informations by this class:

public static void infosByImmutableObject() {
         ImmutableObject iobj = new ImmutableObject(1);

         Console.WriteLine(iobj.ic);

         Type typeIobj = iobj.GetType();

         PropertyInfo infos = typeIobj.GetProperty("ic");

}

I can't understand why, although ic is public, infos remains null, and if I try with Type.GetProperties the result array has zero elements. I noticed that, without the readonly modifier, GetProperties("ic") returns. How a public field is seen by GetProperty() when the readonly is present?

Upvotes: 0

Views: 400

Answers (1)

Panagiotis Kanavos
Panagiotis Kanavos

Reputation: 131228

ic is not a property, it's a field. You should use GetField or GetFields to retrieve a FieldInfo object for it:

FieldInfo infos = typeIobj.GetField("ic");
Debug.Assert(infos!=null);

Fields and properties are different types of members in .NET. In general, properties are considered a part of a class's interface while fields are considered part of its implementation.

Upvotes: 3

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