Namespace

Maha

This program is a modification of original program which is give in the following website
http://www.dotnetperls.com/namespace

I wish to know why modification is not working. Problem is highlighted.

using System;
using A.B.C;

namespace E
{
using D;

class Program
{
static void Main()
{
// Can access CClass type directly from A.B.C.
CClass var1 = new CClass();

// Can access DClass type from D.
DClass var2 = new DClass();

// Must explicitely specify F namespace.
F.FClass var3 = new F.FClass();

// Display types.
Console.WriteLine(var1.ToString());//A.B.C.CClass
Console.WriteLine(var2.ToString());//D.DClass
Console.WriteLine(var3.ToString());//F.FClass

Console.ReadKey();
}
}
}

namespace A
{
namespace B
{
namespace C
{
namespace D
{
public class CClass
{
}
}
}
}
}

namespace D
{
public class DClass
{
}
}

namespace F
{
public class FClass
{
}
}
/*
A.B.C.CClass
D.DClass
F.FClass
*/

6 Replies

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Jitendra Kumar11y ago
ok
Maha11y ago
If more than one answer is acceptable it is not possible to mark one.
Jitendra Kumar11y ago
marked answer as "Accepted Answer"
Maha11y ago
Thank brothers.
Jitendra Kumar11y ago
Hello,

I think you missing namespace.
D namespace is top level namespace.

Namespace :

using A.B.C.D;
using D;

class Program
    {
        static void Main()
        {
            // Can access CClass type directly from A.B.C.
            CClass var1 = new CClass();

            // Can access DClass type from D.
            DClass var2 = new DClass();

            // Must explicitely specify F namespace.
            F.FClass var3 = new F.FClass();

            // Display types.
            Console.WriteLine(var1.ToString());//A.B.C.CClass
            Console.WriteLine(var2.ToString());//D.DClass
            Console.WriteLine(var3.ToString());//F.FClass

            Console.ReadKey();
        }
    }
}

namespace A
{
namespace B
{
namespace C
{
namespace D
{
public class CClass
{
}
}
}
}
}

namespace D
{
    public class DClass
    {
    }
}

namespace F
{
    public class FClass
    {
    }
}
/*
A.B.C.CClass
D.DClass
F.FClass
*/
Vulpes11y ago
Comparing your program with the original, I see that you have now added another nested namespace called D within A.B.C and CClass is within the new namespace.

The reason it doesn't now work is because the nested A.B.C.D namespace is not the same as the 'top level' namespace, D.

To make it work you'd need to add another using directive (highlighted):

using System;
using A.B.C;

namespace E
{
using D;
using A.B.C.D;

class Program
{
static void Main()
{
// Can access CClass type directly from A.B.C.
CClass var1 = new CClass();

// Can access DClass type from D.
DClass var2 = new DClass();

// Must explicitely specify F namespace.
F.FClass var3 = new F.FClass();

// Display types.
Console.WriteLine(var1.ToString());//A.B.C.CClass
Console.WriteLine(var2.ToString());//D.DClass
Console.WriteLine(var3.ToString());//F.FClass

Console.ReadKey();
}
}
}

namespace A
{
namespace B
{
namespace C
{
namespace D
{
public class CClass
{
}
}
}
}
}

namespace D
{
public class DClass
{
}
}

namespace F
{
public class FClass
{
}
}