namespace does not allow impersonation in wcf

The service operation '' that belongs to the contract with the '' name and the 'http://tempuri.org/' namespace does not allow impersonation.

I get the above error when using wcf. 我遇到上面错误在使用wcf服务时。

The solution is as follows：

解决方案在这里：无法从命名空间“http://tempuri.org/”导入绑定“”