DLL to encrypt a string

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How to create a DLL in C# with Interop to traffic data between applications using encryption/decryption of a string that will be sent and received?

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Define public methods in your DLL, add her reference to your project, and then exchange information between your project and the DLL. To generate, every project you compile becomes a DLL in the bin folder. Ideally you create a project just for that, and then add the reference. I think this is enough. I do so.

  • I created the DLL already, and it’s working right. My question is: I was told to do one with "with Interop", what would this be? I’m not finding enough materials to properly understand.

  • But as this part of the DLL is already completed, I will open another question.

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