The referenced dll could not available in the page

Hii,

I have created a class file with a name space of name1. I have created the dll for that. I 开发者_高级运维referenced this dll in my webapplication. But in the namespace section i can't get this namespace 'name1' in the intellisence. I am using the .net 3.5 frame work

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Is the class public? Only public classes are visible to other projects. And if a namespace has no public classes, Intellisense won't display the namespace, either.