How can you find the available Namespaces and their contents in C#?

Question

C# comes with standard namespaces, like System ... and the System namespace hierarchy.

What other namespaces are built into C#? Where can I find a list of the namespaces and contents?

Answer 1

The standard C# namespaces that you're looking for are .NET namespaces, because C# is a language that is built on top of .NET.

You can view the entire .NET API here: https://learn.microsoft.com/en-us/dotnet/api/

For instance, if you are using C# with the .NET Framework, then choose that under the All APIs listing like this: