Is your feature request related to a problem? Please describe.
I want to use ETCD's ttl, and I noticed that there are some lease methods (LeaseGrant and so on) exposed from client, but I can't figure out how to use them.

Describe the solution you'd like
Add some usage examples in README.md.

Thank you for your creating the great client again.

The wiki should describe the purpose of each project in the solution and the overall architecture of the programs. This information could also be included in the repo itself as part of the readme file, or in another text document.

I think that this is a must

https://github.com/linksplatform/Data.Doublets/blob/239271a460e87c6b0e93212d13387b37373acf0e/csharp/Platform.Data.Doublets/Sequences/Frequencies/Counters/TotalMarkedSequenceSymbolFrequencyCounter.cs#L8
The comment should be like this:

Counts total amount of sequences in which the symbol (link) is used.

If it is required - rename the class to match the logic from comment.

Looks like these are duplicates of:
https://github.com/linksplatform/Interfaces/network/dependencies
https://github.com/linksplatform/Interfaces/network/dependents