typescript包是用npm正确安装的，但vs代码找不到它

I am developing a very simple npm package (type-exception) with TypeScript. My tests runs without errors and I was able to publish on NPM and even I can install it in another project (project B); but when I import it as reference, VS Code throw me an Exception "cannot find 'type-exception' module" (on project B)I am developing a very simple npm package (type