Mono
From Wikipedia:
- Mono is a [...] project to create a .NET Framework-compatible set of tools including, among others, a C# compiler and a Common Language Runtime.
Installation
If you need VisualBasic.Net support you have to install the VisualBasic.Net interpreter with the package mono-basicAUR.
/usr/share/.mono/certs/Trust/ but removing the package does not remove them.Running Mono applications
You can execute Mono binaries by calling mono manually:
$ mono programsname.exe
You can also execute Mono binaries directly, just like native binaries:
$ chmod 755 exefile.exe $ ./exefile.exe
Testing Mono
Make a new file:
test.cs
using System;
public class Test {
public static void Main(string[] args) {
Console.WriteLine("Hello World!");
}
}
Then run:
$ mcs test.cs $ mono test.exe Hello world!
Development
OmniSharp provides .NET/Mono development plugins/integrations for several editors, including Vim, Emacs, and Visual Studio Code. Alternatively, you can install the riderAUR IDE.
If you want the API documentation browser and some testing and development tools you have to install mono-tools.
Troubleshooting
I get an error when I try to run Mono binaries directly: "cannot execute binary file"
The binfmt_misc handler for Mono has not yet been set up, as explained in detail on the Mono Project website.
To fix this, restart the systemd-binfmt service.
I get an TLS handshake (or similar certificate based) error
This can be caused by either certificates missing from Mono's certificate store, or stale broken certificates remaining in Mono's certificate store.
If possible, ensure that the system certificate store is in good order by running curl -vI or similar to replicate the failing request outside Mono.
- synchronises the mono store with the system store, adding missing certificates.
- To remove broken certificates (i.e., if above didn't help), remove the directory , then re-run
- As last resort, the older tool bypasses the system certificate store and directly downloads Mozilla's trust store. This again does not remove broken certificates, and can cause other problems if you rely on private CAs.
Both and are part of the mono package.