[.NET] Update readme with instructions for running tests and examples

interfaces/dotnet/README.md

@@ -5,7 +5,7 @@ such as C# and F#. It is written in C# and supports .NET Standard 2.0
 (for the primary project) and .NET 6 (and newer) on all platforms that support both
 .NET and the Cantera C++ library.
 
-### Project Layout
+## Project Layout
 
 The primary C# project is Cantera.csproj. This project uses P/Invoke extensively with
 the native Cantera library via the Cantera C interface (CLib), and wraps the low-level
@@ -23,7 +23,7 @@ The examples directory contains separate projects for each Cantera example. Thes
 be packaged as a template for use with the .NET CLI, allowing developers to create a
 solution with all the examples using `dotnet new`.
 
-### Contributing
+## Contributing
 
 Like all of Cantera, we welcome contributions to the .NET interface. Contributors should
 read the [code of conduct](/CODE_OF_CONDUCT.md) and check out our general and
@@ -33,8 +33,25 @@ This includes being comfortable with `unsafe` blocks and interop concepts such a
 raw pointers, understanding how to use `Span<T>` and similar memory APIs, and having
 a solid grip on object-oriented library design.
 
-### Status
+Discussions about contributing to the .NET interface assumes the developer has installed
+the .NET SDK and is using the text editor of their choice, optionally with a plugin for
+C# development installed. Visual Studio is _not_ required, and although contributors
+may choose to use it, submissions should not depend on Visual Studio or require
+the use of Windows.
+
+### Running Tests
+
+After [building the main Cantera library](https://cantera.org/install/compiling-install.html),
+switch to this directory and run `dotnet test`.
+
+### Running Examples
+
+After running the tests, examples can be run with `dotnet run --project examples/X`,
+where X is the name of the directory containing the example project, for example
+`dotnet run --project examples/SoundSpeed`.
+
+## Status
 
 The .NET Interface is in preview and still missing many features
 needed for parity with the C++ and Python interfaces. Interested contributors can see
-the status of the project at [Enhancement #156](https://github.com/Cantera/enhancements/issues/156).
+the status of the project at Cantera/enhancements#156.