"Hashtable" called a hash table, based on key-value pairs to pass values. Now I will write how to use the "Hashtable" to return json string, you first need cross-domain this in my essay has been written, cross-domain can then create a following
After air controllers
Select the empty api controller, built after we send a get and post requests,
First we get a write request, and 
obviously we need to reference the hashtable
Click on the first, then we write some test data, 
so then we run the project, and with the postman test
