IS Seq file also platform independent or dependent?

Yes.

no .net is not platform independent is supports on OS .... as is need clr for Linux to

support it but till now .net platform is not independent ...

No, they must be designed for specific platforms. The compiled programs are platform-independent.

Model-based engineering allows engineers to think about systems at a high level of abstraction, without concern for the details of their implementation. This reduces the likelihood of errors, speeds up the design and implementation process, and allows for the creation of reusable, platform-independent application models. By using powerful tools, system implementations can be generated for different platforms from the same model. Therefore, to adapt the system to some new platform technology, it is only necessary to write a translator for that platform. When this is available, all platform-independent models can be rapidly rehosted on the new platform.

Platform dependent requires the application to be run on specific hardware. independent will run on many kinds of hardware.