netcharting问题

Imports dotnetCHARTING.WinForms问题怎么解决？以下是问题描述
WarningNamespace or type specified in the Imports 'dotnetCHARTING.WinForms ' doesn 't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn 't use any aliases.

[解决办法]
没导入命名空间