Development Issues

" system.runtime.compilerservices.extensionattribute..ctor "

Solution : - 

The dll newtonsoft labels as being for 3.5 is actually not going to work with 3.5. You have to use the dll they label as being for .net 2.0."

Delete in refernce folders ''Newtonsoft.Json" and once again add the from Bin folder.

Json.NET is a popular high-performance JSON framework for .NET

To install Json.NET, run the following command in the Package Manager Console

PM>Install-Package Newtonsoft.Json


Private Constructor in C# :

What is the use of Private Constructor

More Reading About Private Constructor...!