Get static property through reflection .NET

I've seen this answered already, but it hasn't worked for me. I'm trying to access a (non-static) class static property from the base class, from an derived instance.

In the base class:

Type type = this.GetType();
PropertyInfo propInf = type.GetProperty("DirectoryCode", BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);

Here propInf is null (type is the derived class type).

In the derived class:

public class DTGCSMissonParameters : ModelBase
{
   public static ushort DirectoryCode = (ushort) DIR.MISSION_PARAMETERS;

Thanks