Csharp/CSharp Tutorial/Windows/Registry Save

delete a key from Registry

<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using Microsoft.Win32;

public class MainClass{

   static void Main(string[] args){
        string strKey;
        string strAns;
        Console.WriteLine("Enter the key under HKEY_CURRENT_USER to delete");
        strKey = Console.ReadLine();
        Console.WriteLine("Do you really mean to delete: " + strKey + " and its settings?");
        strAns = Console.ReadLine();
        strAns = strAns.ToUpper();
        if (strAns == "YES" | strAns == "Y")
        {
              Registry.CurrentUser.DeleteSubKeyTree(strKey);
              Console.WriteLine("Key " + strKey + " deleted");
        }
        else
        {
              Console.WriteLine("No deletion performed");
        }
   }

}</source>

Delete a setting in Registry

<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using Microsoft.Win32;

public class MainClass{

   static void Main(string[] args){
       string strKey;
       string strSetting;
       string strAns;
       Console.WriteLine("Enter the key");
       strKey = Console.ReadLine();
       RegistryKey TestProject = Registry.CurrentUser.OpenSubKey(strKey, true);
       Console.WriteLine("Enter the setting");
       strSetting = Console.ReadLine();
       Console.WriteLine("Do you really mean to delete: " + strKey + "\\" + strSetting + "?");
       strAns = Console.ReadLine();
       strAns = strAns.ToUpper();
       if (strAns == "Y" | strAns == "YES")
       {
            TestProject.DeleteValue(strSetting);
            Console.WriteLine("Key setting " + strKey + "\\" + strSetting + " deleted");
       }
       else
       {
            Console.WriteLine("No deletion performed; key closed");
            TestProject.Close();
       }
   }

}</source>

Save int value to Registry

<source lang="csharp">using System; using Microsoft.Win32; class MainClass {

   public static void Main(String[] args)
   {
       Registry.SetValue(
           @"HKEY_CURRENT_USER\Software\CompanyName\SoftwareName",
           "IntValueName", 101, RegistryValueKind.DWord);
   }

}</source>

Save user prefs to registry

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; using Microsoft.Win32; using System.Diagnostics; public class MainClass{

  public static void Main(){
   RegistryKey regKey = Registry.CurrentUser;
   regKey = regKey.CreateSubKey("Software\\YourSoftwareName\\SubDomain");
   regKey.SetValue("CurrSize", 10);
   regKey.SetValue("CurrColor", "Blue");
  }

}</source>

Set DateTime value to the Registry

<source lang="csharp">using System; using Microsoft.Win32; class MainClass {

   public static void Main(String[] args)
   {
       Registry.SetValue(
           @"HKEY_CURRENT_USER\Software\CompanyName\SoftwareName",
           "DateTimeValue", DateTime.Now.ToString(), RegistryValueKind.String);
   }

}</source>

Set String value to the Registry

<source lang="csharp">using System; using Microsoft.Win32; class MainClass {

   public static void Main(String[] args)
   {
       Registry.SetValue(
           @"HKEY_CURRENT_USER\Software\CompanyName\SoftwareName",
           "User", Environment.UserName, RegistryValueKind.String);
   }

}</source>