How to use external dll

[huston]

Hi all,

I have an external dll file, which i want to add it to my Web project.

But whenever I try to add the same through references, I get the error as "This is not a valid com component, use file with extension '.dll' "

The dll file has the extension as dll, but still it is not taking.

please help.

[Tatter]

Did you compile the .dll yourself? That message also occurrs if you try to use a file that is not actually a .dll, even though the file extension may be .dll. For example, if someone renamed a .gif file to have a .dll extension, and then gave you that file claiming it was a .dll file. Or, the .dll could be corrupt, damaged, or malformed in some way that prevents .NET from properly locating its COM interop information.

[Motoma]

Is it a COM assembly? What may be happening is that you are trying to reference a DLL with a newer .NET framework than the one you are building with. You can not reference a .NET 2.0 DLL in a .NET 1.1 project.