using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Configuration; 
 
namespace DotNet.Utilities.配置文件操作类 
{ 
 public class ConfigHelper_sufei 
 { 
  /// <summary> 
  /// 根据Key取Value值 
  /// </summary> 
  /// <param name="key"></param> 
  public static string GetValue(string key) 
  { 
   return ConfigurationManager.AppSettings[key].ToString().Trim(); 
  } 
 
  /// <summary> 
  /// 根据Key修改Value 
  /// </summary> 
  /// <param name="key">要修改的Key</param> 
  /// <param name="value">要修改为的值</param> 
  public static void SetValue(string key, string value) 
  { 
   ConfigurationManager.AppSettings.Set(key, value); 
  } 
 
  /// <summary> 
  /// 添加新的Key ，Value键值对 
  /// </summary> 
  /// <param name="key">Key</param> 
  /// <param name="value">Value</param> 
  public static void Add(string key, string value) 
  { 
   ConfigurationManager.AppSettings.Add(key, value); 
  } 
 
  /// <summary> 
  /// 根据Key删除项 
  /// </summary> 
  /// <param name="key">Key</param> 
  public static void Remove(string key) 
  { 
   ConfigurationManager.AppSettings.Remove(key); 
  } 
 } 
}