Difference between ConfigurationManager and ConfigurationSettings

Question

System.Configuration.ConfigurationManager.AppSettings [“key”]和System.Configuration.ConfigurationSettings.AppSettings [“key”]之间的主要区别是什么？

Answer 1

ConfigurationManager have more functional than ConfigurationSettings as list below
1. ConfigurationManager can access appsetting and connectionstring section
2. ConfigurationManager provide function that you can use to read and write config.
3. Permission by user level
4. ...... and other that you can see on msdn

Refer to http://msdn.microsoft.com/En-US/library/system.configuration.configurationmanager.aspx

Answer 2

ConfigurationSettings.AppSettings is obsolete. ConfigurationManager.AppSettings is the replacement.

Answer 3

Keep in mind that the ConfigurationManager object is in a different (DLL) assembly even though the namespace is the same.

ConfigurationManager Namespace: System.Configuration Assembly: System.Configuration (in System.Configuration.dll)

ConfigurationSettings Namespace: System.Configuration Assembly: System (in System.dll)

Anton

Answer 4

Sometimes it's a good idea to read the docs..

http://msdn.microsoft.com/en-en/library/system.configuration.configurationsettings(v=vs.80).aspx

Provides runtime versions 1.0 and 1.1 support for reading configuration sections and common configuration settings.

In other words, ConfigurationSettings class is deprecated.

Answer 5

'System.Configuration.ConfigurationSettings.AppSettings' is obsolete: Obsolete means old or no longer in use. It has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings'