C # pointer linked list structure unsafe

Using system;
Using system. Collections. Generic;
Using system. componentmodel;
Using system. Data;
Using system. drawing;
Using system. text;
Using system. Windows. forms;

Namespace windowsapplication10
{
Public partial class form1: Form
{
Public form1 ()
{
Initializecomponent ();
}

Private void button#click (Object sender, eventargs E)
{

Node mynode = new node ();

Mynode. addnode ("first ");

Mynode. addnode ("second ");

Mynode. addnode ("third ");

Mynode. addnode ("forst ");

Node node;

Node = mynode;
While (node! = NULL)
{
MessageBox. Show (node. Name );
Node = node. Next;
}

Mynode. delnode (3 );

Node = mynode;
While (node! = NULL)
{
MessageBox. Show (node. Name );
Node = node. Next;
}

}

Unsafe int sum (int * I, int * j)
{
Return * I + = * J;
}

Unsafe int sumsafe (int I, Int J)
{
Return sum (& I, & J );
}

Private unsafe void button2_click (Object sender, eventargs E)
{
// Int J = sumsafe (2, 3 );
Int A = 2;
Int B = 3;
Int J = sum (& A, & B );
MessageBox. Show (J. tostring ());
}

Private unsafe void button3_click (Object sender, eventargs E)
{
Int I = 3;
Ptrnode PTR = new ptrnode (& I );

Int J = 3;
Ptrnode P = new ptrnode (& J );

PTR. Next = & P;

}

}

Public class Node
{
Private string name;
Private node head;
Private node next;
Private int index;

Public string name
{
Get {return this. Name ;}
Set {This. Name = value ;}
}

Public node head
{
Get {return this. Head ;}
}

Public node next
{
Get {return this. Next ;}
}

Public node ()
{
Name = "nodehead ";
}

Public void addnode (string name)
{
Node x = this;
Node T = new node ();
T. Name = Name;

While (X. Next! = NULL)
{
X = x. Next;
}

X. Next = T;
T. Head = X;

Index = index + 1;
}

Public void delnode (INT index)
{
Node temp = this;

Int I = 0;
While (I <index)
{
Temp = temp. Next;
I + = 1;
}

Temp. Head. Next = temp. Next;
}

}

Unsafe struct ptrnode
{
Public int * ID;
Public ptrnode * next;

Public ptrnode (int * Aid)
{
Id = aid;
Next = NULL;
}
}

}