CS0246 The type or namespace name 'VisualComponents' could not be found (are you missing a using directive or an assembly reference?)

Hi
I am taking a evaluate of Visual Component and having a trial of .Net Add on Example001
But visual studio 2017 indicates an error during the build process which read as:

|Severity|Code|Description|Project|File|Line|Suppression State|
|—|---|—|---|—|---|—|
|Error|CS0246|The type or namespace name ‘VisualComponents’ could not be found (are you missing a using directive or an assembly reference?)|Example001|E:\workspace\Example001\Example001\MyScene.cs|9|N/A|

I wonder if anyone has met the same problem and how to solve it?

My system environment info is:

O.S.: Windows10 64 bit ver.2004
IDE: Visual Studio 2017 Enterprise
Visual Component: Visual Components Premium 4.2 Evaluation License

Thank you

Like the compiler warnings say, you need to change the target .NET Framework version of your project to 4.7.2.

It really works~
I did not check the net framework version with the academy demonstrated and the visual studio platform I installed ( What a foolish mistake )
Thank you~