Java vs. C#

default Modifier

Java
 
class A
{
    int x;
    static void F(B b) {
        b.x = 1;    // Ok
    }
}
class B extends A
{
    static void F(B b) {
        b.x = 1;    // Ok
    }
}


class A {...}
public class B
{
	A F() {...}
	A G() {...}
	public A H() {...}//ok
}

C#
 
class A
{
    int x;
    static void F(B b) {
        b.x = 1;    // Ok
    }
}
class B: A
{
    static void F(B b) {
        b.x = 1; // Error, x not accessible
    }
}


class A {...}
public class B
{
	A F() {...}
	internal A G() {...}
	public A H() {...}//error
}
the H method in B results in a compile-time 
error because the return type A is not at least 
as accessible as the method.