I learned Java while ago. I just got bored of Java and returned to C++ after a while. I thought that C# was similar to Java. My assumption about the similarities between C#
I may be wrong, but here is how I see it: it means that the various parts of a system are separated from each other and can easily be replaced.
In dynamic languages it's relatively easy because of their flexibility, but in languages such as C# and Java you need to use special techniques such as dependency injection.