This is a Frankenstein (Fronkensteen for the cultured folk) project to show that it's technically possible to compile C# .NET down to a static binary without any OS dependencies (besides syscall's and file system paths).
This was most definitely a "can it be done" rather than a "should it be done" endeavor so YMMV.
Resultant binary size for the "Hello, World" project clocks in at 1108K but it might be possible to reduce that. See trimming options.
PS C:\Users\ashurack\source\repos\NativeAOTStatic> docker run --rm -it -v ${PWD}:/app -w /app centos:6 sh
sh-4.1# cat /etc/redhat-release
CentOS release 6.10 (Final)
sh-4.1#
sh-4.1# file NativeAOTStatic/bin/Release/net9.0/linux-musl-x64/native/NativeAOTStatic
NativeAOTStatic/bin/Release/net9.0/linux-musl-x64/native/NativeAOTStatic: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped
sh-4.1#
sh-4.1# NativeAOTStatic/bin/Release/net9.0/linux-musl-x64/native/NativeAOTStatic
Hello, World!
PS C:\Users\ashurack\source\repos\NativeAOTStatic> docker run --rm -it -v ${PWD}:/app -w /app centos:5 sh
sh-3.2# cat /etc/redhat-release
CentOS release 5.11 (Final)
sh-3.2#
sh-3.2# ldd NativeAOTStatic/bin/Release/net9.0/linux-musl-x64/native/NativeAOTStatic
not a dynamic executable
sh-3.2#
sh-3.2# NativeAOTStatic/bin/Release/net9.0/linux-musl-x64/native/NativeAOTStatic
Hello, World!