configuration

[zhlu]

I am using the following code to read the app.config file:
           string[] names = ConfigurationManager.AppSettings.AllKeys;
           NameValueCollection appStgs = ConfigurationManager.AppSettings;
           for (int i = 0; i < appStgs.Count; i++)
           {
              log.Debug(i+" Name: " + names[i] + " Value: "+
                appStgs[i]);
           }

And got the following errors:

- System.Configuration.ConfigurationErrorsException: Configuration 
system failed to initialize ---> 
System.Configuration.ConfigurationErrorsException: Unrecognized 
configuration section sectionGroup. 
(C:\c#\Window_form\CodeMaker_ibatis\CodeMaker_ibatis\bin\Debug\CodeMaker_ibatis.exe.config line 
8)
  at 
System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean 
ignoreLocal)
  at 
System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors 
schemaErrors)
  at System.Configuration.BaseConfigurationRecord.ThrowIfInitErrors()
  at System.Configuration.ClientConfigurationSystem.EnsureInit(String 
configKey)
  --- End of inner exception stack trace ---
  at System.Configuration.ConfigurationManager.GetSection(String sectionName)
  at System.Configuration.ConfigurationManager.get_AppSettings()
  at CodeMaker_ibatis.OpenDBDialogBox..ctor() in 
C:\c#\Window_form\CodeMaker_ibatis\CodeMaker_ibatis\OpenDBDialogBox.cs:line 
36

Any idea?

-Henry