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I met this issue in many months ago. At newest version of Mono, this issue still at here.
I had a customize configuration section in "app.config" which it is will be used in our system. It's called "CustomerConfig".
I always get a EXCEPTION object when i use those methods at below:
XmlDocument document = new XmlDocument();
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var object1 = config.GetSection("CustomerConfig");
//System.ArgumentNullException has been thrown
//Argument cannot be null.
//Parameter name: s
But, in the .NETFRAMEWORK 4.0, it's fine.
Solution files already attached, pls check it.
System & Mono Enviroment Infomation:
Mono JIT compiler version 3.0.2 (master/9e7f206)
Copyright (C) 2002-2012 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
Notification: Thread + polling
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
Created attachment 3134 [details]