.NET, C#, Reflection: list the fields of a field that, itself, has fields

Question

In .NET & C#, suppose ClassB has a field that is of type ClassA. One can easily use method GetFields to list ClassB\'

Answer 1

Try the following. It lets you control how deep you descend into the type hierarchy and should only descend into non-primitive types.

public static class FieldExtensions
{
  public static IEnumerable GetFields( this Type type, int depth )
  {
    if( depth == 0 )
      return Enumerable.Empty();

    FieldInfo[] fields = type.GetFields();
    return fields.Union(fields.Where( fi => !fi.IsPrimitive )
                              .SelectMany( f => f.FieldType.GetFields( depth -1 ) );
  }
}