Managing default values for entities in EF: the from birth way

I recently face the problem of setting default value for entities when using entity framework.

After some walk around, here is a part of my actual solution.

This is not really the default values of the properties, but the default values of the types of the properties.

Please consider the following class:

using System;
using System.Linq;
using System.Reflection;


namespace AppXYZ.Entities {
    public static class EntityTools {
        public static readonly DateTime dtDef = new DateTime(1900, 1, 1, 0, 0, 0);

        public static void SetDefaults (object o) {
            Type T = o.GetType();
            foreach ( MemberInfo m in T.GetProperties() ) {
                PropertyInfo P = T.GetProperty(m.Name);
                switch ( Type.GetTypeCode(P.PropertyType) ) {
                    case TypeCode.String :
                        if ( P.GetValue(o, null) == null ) 
                            P.SetValue(o, String.Empty, null); 
                        break;
                    case TypeCode.DateTime :
                        if ( (DateTime)P.GetValue(o, null) == DateTime.MinValue )
                            P.SetValue(o, EntityTools.dtDef, null); 
                        break;
                }
            }
        }

        //T must have a constructor with 0 argument
        public static T GetNewEntity<T> () {
            T e;
            try {
                e = Activator.CreateInstance<T>();
            } catch {
                e = default(T);
            }
            SetDefaults(e);


            return e;
        }
    }
}

Since, I discover at least another way: the just on time way