C# winform 读取app.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="Conn" connectionString="Data Source=127.0.0.1;Initial Catalog=test;Persist Security Info=True;User ID=test;Password=test;Min Pool Size=1;Max Pool Size=10;Connect Timeout=30;Load Balance Timeout=60;ConnectRetryCount=10" providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
<add key="CKName" value=" " />
</appSettings>
</configuration>
需要引用 using System.Configuration;
如果还有问题，需要在解决方案管理器中找到“引用”，点击右键“添加引用”找到System.Configuration即可。
设置CKName方法
private void SetCKName(string value) {
Configuration cfa = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
cfa.AppSettings.Settings["CKName"].Value = value;
cfa.Save();      System.Configuration.ConfigurationManager.RefreshSection("appSettings");
}
取得CKName方法
private string GetCKName()
{
String CKName = ConfigurationManager.AppSettings["CKName"];
return CKName;
}