docs

docs/FAQ.md

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 title: FAQ
-nav_order: 9
+nav_order: 11
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 ### I occasionally get a NullReferenceException, what's wrong?

docs/Glossary.md

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 title: Glossary
-nav_order: 8
+nav_order: 10
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 |Definition|Synonyms|Meaning|

docs/Implementation.md

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-TODO steps for creating a new implementation
+---
+title: Creating an implementation
+nav_order: 8
+---
+
+TODO 

docs/Interfaces.md

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 nav_order: 5
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+Clients have a common interface implementation to allow a shared code base to use the same functionality for different exchanges. The interface is implemented at the `API` level, for example:
+```csharp
+var binanceClient = new BinanceClient();
+ISpotClient spotClient = binanceClient.SpotApi.CommonSpotClient;
+IFuturesClient futuresClient = binanceClient.UsdFuturesApi.CommonFuturesClient;
+
+```
+
 ## ISpotClient
 TODO 
 

docs/Migration Guide.md

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 title: Migrate v4 to v5
-nav_order: 7
+nav_order: 9
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 Changes from 4.x to 5.x:

docs/RateLimiter.md

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 title: Rate limiting
-nav_order: 6
+nav_order: 7
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