string appSetting = txtAppSetting.Text;//appSetting子节点值
string connectionString = txtConnectionString.Text;//连接字符串
string key = txtKey.Text;//appSetting子节点Key
string connectionName = txtConnectionName.Text;//连接Name
ConfigurationOperator op = new ConfigurationOperator();
op.SetAppSetting(key, appSetting);
op.SetConnectionString(connectionName, connectionString);
op.Save();
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