C# 操作注册表WindowsRegistry

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Win32;
namespace BugsBox.Application.Core
{
public class WindowsRegistry
{

const string REGISTRY_ITEM_PATH = "software\\pharmacyinst";
/// <summary>
/// 创建注册表项
/// </summary>
/// <param name="registryItemPath"></param>
public static void CreateRegistry(string registryItemPath = REGISTRY_ITEM_PATH)
{
RegistryKey key = Registry.LocalMachine;
RegistryKey software = key.CreateSubKey(registryItemPath);
//在HKEY_LOCAL_MACHINE\SOFTWARE下新建名为test的注册表项。如果已经存在则不影响！
}

/// <summary>
/// 获取注册表值
/// </summary>
/// <returns></returns>
public static string GetRegistryValue(string key, string registryItemPath = REGISTRY_ITEM_PATH)
{
string info = "";
RegistryKey Key;
Key = Registry.LocalMachine;
var myreg = Key.OpenSubKey(registryItemPath);
info = myreg.GetValue(key).ToString();
myreg.Close();
return info;
}

/// <summary>
/// 修改注册表项值
/// </summary>
/// <param name="subKey"></param>
/// <param name="val"></param>
/// <param name="registryItemPath"></param>
public static void SetRegistryValue(string subKey, string val, string registryItemPath = REGISTRY_ITEM_PATH)
{
using (RegistryKey key = Registry.LocalMachine)
{
RegistryKey software = key.OpenSubKey(registryItemPath, true); //该项必须已存在
software.SetValue(subKey, val);
//在HKEY_LOCAL_MACHINE\SOFTWARE\test下创建一个名为“test”，值为“博客园”的键值。如果该键值原本已经存在，则会修改替换原来的键值，如果不存在则是创建该键值。
// 注意：SetValue()还有第三个参数，主要是用于设置键值的类型，如：字符串，二进制，Dword等等~~默认是字符串。如：
// software.SetValue("test", "0", RegistryValueKind.DWord); //二进制信息
key.Close();
}
}

/// <summary>
/// 删除注册表项
/// </summary>
public static void DeleteRegistry(string registryItemPath = REGISTRY_ITEM_PATH)
{
RegistryKey key = Registry.LocalMachine;
key.DeleteSubKey(registryItemPath, true); //该方法无返回值，直接调用即可
key.Close();
}

/// <summary>
/// 删除注册表值
/// </summary>
public static void DeleteRegistryValue(string subKey, string registryItemPath = REGISTRY_ITEM_PATH)
{
RegistryKey delKey = Registry.LocalMachine.OpenSubKey(registryItemPath, true);
delKey.DeleteValue(subKey);
delKey.Close();
}

/// <summary>
/// 判断注册表项是否存在
/// </summary>
/// <returns></returns>
public static bool IsRegeditItemExist()
{
string[] subkeyNames;
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey("SOFTWARE");
//RegistryKey software = hkml.OpenSubKey("SOFTWARE", true);
subkeyNames = software.GetSubKeyNames();
//取得该项下所有子项的名称的序列，并传递给预定的数组中
foreach (string keyName in subkeyNames)
//遍历整个数组
{
if (keyName == "test")
//判断子项的名称
{
hkml.Close();
return true;
}
}
hkml.Close();
return false;
}
/// <summary>
/// 判断键值是否存在
/// </summary>
/// <returns></returns>
public static bool IsRegeditKeyExist(string subKey, string registryItemPath = REGISTRY_ITEM_PATH)
{
string[] subkeyNames;
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey(registryItemPath);
//RegistryKey software = hkml.OpenSubKey("SOFTWARE\\test", true);
subkeyNames = software.GetValueNames();
//取得该项下所有键值的名称的序列，并传递给预定的数组中
foreach (string keyName in subkeyNames)
{
if (keyName == subKey) //判断键值的名称
{
hkml.Close();
return true;
}

}
hkml.Close();
return false;
}
}
}