Guides for Serilog and EFCore (#2134)

* Add serilog guide

* added suggestions from Rozen

* Add efcore guide

* Fix review changes

* Fix grammatical errors & review points

docs/guides/other_libs/serilog.md

@@ -0,0 +1,45 @@
+---
+uid: Guides.OtherLibs.Serilog
+title: Serilog
+---
+
+# Configuring serilog
+
+## Prerequisites
+
+- A basic working bot with a logging method as described in [Creating your first bot](xref:Guides.GettingStarted.FirstBot)
+
+## Installing the Serilog package
+
+You can install the following packages through your IDE or go to the nuget link to grab the dotnet cli command.
+
+|Name|Link|
+|--|--|
+|`Serilog.Extensions.Logging`| [link](https://www.nuget.org/packages/Serilog.Extensions.Logging)|
+|`Serilog.Sinks.Console`| [link](https://www.nuget.org/packages/Serilog.Sinks.Console)|
+
+## Configuring Serilog
+
+Serilog will be configured at the top of your async Main method, it looks like this
+
+[!code-csharp[Configuring serilog](samples/ConfiguringSerilog.cs)]
+
+## Modifying your logging method
+
+For Serilog to log Discord events correctly, we have to map the Discord `LogSeverity` to the Serilog `LogEventLevel`. You can modify your log method to look like this.
+
+[!code-csharp[Modifying your log method](samples/ModifyLogMethod.cs)]
+
+## Testing
+
+If you run your application now, you should see something similar to this
+![Serilog output](images/serilog_output.png)
+
+## Using your new logger in other places
+
+Now that you have set up Serilog, you can use it everywhere in your application by simply calling
+
+[!code-csharp[Log debug sample](samples/LogDebugSample.cs)]
+
+> [!NOTE]
+> Depending on your configured log level, the log messages may or may not show up in your console. Refer to [Serilog's github page](https://github.com/serilog/serilog/wiki/Configuration-Basics#minimum-level) for more information about log levels.