需要添加引用，System.Configuration;
写系统配置文件：
Configuration cfa = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
if (addrService != "")
{
cfa.AppSettings.Settings["WebServiceUrl"].Value = addrService;
}
if (setLogin != "")
{
cfa.AppSettings.Settings["LoginServerUrl"].Value = setLogin;
}
if (mapPath != "")
{
cfa.AppSettings.Settings["InitMapPath"].Value = mapPath;
}
cfa.Save(ConfigurationSaveMode.Modified);
//重新加载配置文件
ConfigurationManager.RefreshSection("appSettings");
读：
<pre name="code" class="csharp"> string value = ConfigurationSettings.AppSettings["InitMapPath"];</pre> <pre></pre> <p></p> <pre></pre> <br> <br> <p></p> <p><br> </p>
