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The communication between the .Net components can be achieved with COM components using RCW called Runtime Callable Wrapper. We can use the RCW in the following ways. 1. We can generate Wrapper class using Visual Studio and can place it in BIN directory. 2. We can use the type library importer tool - Tlbimp.exe 3. We can use the Interopservices. System.Runtime.Interopservices namespace provides TypeLib Converter that has methods to convert COM classes and interface in to assembly metadata. 4. We can create our own custom wrappers.