the following code:

------------------------------------------

void f1()
{
 class foo
 {
 }
}

void f2()
{
 class foo
 {
  public int a;
 }

 foo x = new foo;
 x.a = 0;
}

void main()
{
 f1();
 f2();
}

------------------------------------------

causes an error:
no property 'a' for type 'foo'

if the definition of class foo in function f1 is removed, there's no error. seems like classes defined in functions were put to a global scope but without any redefinition errors and yet this isnt possible:

void f1()
{
 class foo
 {
  public int a;
 }
}

void f2()
{
 foo x = new foo;
 x.a = 0;
}

void main()
{
 f1();
 f2();
}

hope this helps