This is long overdo... Just a short and simple example of Partial Function Application.

For some good explanations, which also include the difference between Currying and Partial Function Application, check out:

http://msmvps.com/blogs/jon_skeet/archive/2012/01/30/currying-vs-partial-function-application.aspx

and also this answer on stackoverflow: http://stackoverflow.com/a/8826698/532517

And here is the example, taken from real code:

        internal void Addfile(string parentDirName, string fileName, long size)

        {

            AddElement(parentDirName, fileName, (name, parent) => new File(name, size, parent));

        }

        public void AddDir(string parentDirName, string dirName)

        {

            AddElement(parentDirName, dirName, (name, parent) => new Directory(dirName, parent));

        }

        private void AddElement(string parentDirName, string name,

                                Func<string, FileSystemElement, FileSystemElement> elementCreator)

        {

            ValidateFileNames(parentDirName, name);

            var parent = (Directory)_index[parentDirName];

            FileSystemElement element = elementCreator(name, parent);

            parent._elements.Add(element);

            _index.Add(name, element);

        }