Exceptions under DeclaringParameter, GenericParameterAttributes and GenericParameterPosition

System.Reflection.Assembly myAssembly = System.Reflection.Assembly.GetEntryAssembly();
Type[] Types = myAssembly.GetTypes();
foreach (Type myType in Types)
{
     if (myType.BaseType == null) continue;                               

     if (myType.BaseType == typeof(Form))
     {
        IEnumerable<Component> x = EnumerateComponents(myType)         
     }
 }

Why under myType I get exceptions and how to solve them?

UPDATE

method which should process myType

public IEnumerable<Component> EnumerateComponents(object formobj)
{
   var l = (from field in formobj.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
           where typeof(Component).IsAssignableFrom(field.FieldType)
           let component = (Component)field.GetValue(formobj)
           where component != null
           select component);

            return l;
 }