How to solve, Error: "The type or namespace name "Hands" could not be found(are you missing an using directive or an assembly reference ?)(CS0246)

[sdeflab]

While trying to integrate the leap motion device with C Sharp application, the error observed is attached for your valuable suggestion & solution.
The details of the environment in which the application is build with leap motion are,
Windows 7 OS
.NET framework 4.5
Unity version 2017.1.1f1
IDE:Mono develop
LeapCSharp.NET.3.5
LeapDeveloperKit_3.2.1+45911_win
Core_Assets_4.3.3
HandModule_2.1.2
Interaction_Engine_1.1.0