nini.standard is a port of nini library to .Net Standard 2.0. I have created it when I was unlucky to get assignment on porting a large legacy project to .Net Core.
Nini is an uncommonly powerful .NET configuration library designed to help build highly configurable applications quickly.
You can check the license on author's web site
Nini is distributed under the MIT license, which is similar to the BSD license. This license means that you can distribute this application and/or the source code with your commercial or non-commercial application for free. You will never have to pay me or anyone to use it :) All you have to do is if you use any of the source code of the application you must add the copyright to the source code file, which is the following #region in the C# file (if you are distributing the binary you do not need to do anything):
#region Copyright
//
// Nini Configuration Project.
// Copyright (C) 2004 Brent R. Matzelle. All rights reserved.
//
// This software is published under the terms of the MIT X11 license, a copy of
// which has been included with this distribution in the LICENSE.txt file.
//
#endregion
This license is compatible with the GNU GPL
Here is a copy of the license. This is the same as you will find in the LICENSE.txt file of the distribution.
Nini Configuration Project.
Copyright (c) 2004 Brent R. Matzelle
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.