Our users use different language, so I don't think that's related with Korean IDE.
I guess that's a version conflict, but I don't know where is the problem.
Please see whether I missed any steps for reproduce that as below:
1. Open ThinkGeo Product Center 9.0, activate MapSuite World Map Kit SDK
2. Click "Overview", download 184.108.40.206 12/20/2015, Click "Project Templates" download and launch "World Map Kit SDK Sample".
3. Download 220.127.116.11 12/20/2015 for WPF Desktop edition
4. Replace the folder "World Map Kit Layer Source Code" into "World Map Kit SDK Sample", reference the latest MapSuiteCore.dll and WpfDesktopEdition.dll.
5. Run the project.
Follow the steps, the sample project works well.