This document contains C# code for a RegistryModClass that allows modifying registry keys related to network interfaces. The class constructor opens the registry key path and gets the names of existing subkeys. Methods are defined to search for, add, remove, and verify registry key values under the given subkeys. Private fields store the registry key object and path used to access the keys.

1. /*
By: John Zamoider
Copywrite: 2016
For Demonstration use only.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Win32;
namespace BasicShell_Support
{
class RegistryModClass
public RegistryModClass ()
{
RegistryKey serviceNames = start.OpenSubKey(keyPath);
if (serviceNames == null)
{
Console.WriteLine("Bad registry key");
return;
}
string[] networkCards = serviceNames.GetSubKeyNames();
serviceNames.Close();
//set seperate public keys
pubKeyLoc = networkCards;
pubKeyPath = keyPath;
}//end constructor
public string searchKey(string[] keyLoc)
{
string returnString = "No";
foreach (string keyname in keyLoc)
{
Console.WriteLine(keyname);
//add local key together to make it managaable
string localKey = start + "" + keyPath + keyname;
try
{
Console.WriteLine(start.OpenSubKey(localKey).GetValue("TcpAckFrequency").ToStrin
g());
returnString = "Installed";
}catch (Exception e)
{
Console.WriteLine(e + "Error Reading registry: " +
"TcpAckFrequency".ToUpper());
returnString = "Not Installed";
}//end catch

2. }//end foreach
return returnString;
}//end searchKey
public void enterKey(string[] keyLoc)
{
foreach (string keyname in keyLoc)
{
//add local key together to make it managaable
string localKey ="" + keyPath + keyname;
RegistryKey key = start.OpenSubKey(localKey);
key.SetValue("TcpAckFrequency", 1, RegistryValueKind.DWord);
key.Close();
}
}//end enterKey
public void removeKey(string[] keyLoc)
{
foreach (string keyname in keyLoc)
{
//add local key together to make it managaable
string localKey = start + "" + keyPath + keyname;
}
}//end removeKey
public void verifyKey(string[] keyLoc)
{
foreach (string keyName in keyLoc)
{
Console.WriteLine(keyName);
}
}//end verifyKey
public string[] pubKeyLoc;
public string pubKeyPath;
public RegistryKey start = Registry.LocalMachine;
private string keyPath =
"SYSTEMCurrentControlSetServicesTcpipParametersInterfaces";
}//end class
}//end namespace