simple hello world

.gitignore

@@ -0,0 +1,3 @@
+result
+*/bin
+*/obj

console/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

console/console.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

dotnet-nix-testing.sln

@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "console", "console\console.csproj", "{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|x64.Build.0 = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Debug|x86.Build.0 = Debug|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|x64.ActiveCfg = Release|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|x64.Build.0 = Release|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|x86.ActiveCfg = Release|Any CPU
+		{DA7E69E4-09C2-45F5-9D98-D477D3B5B6FD}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

flake.nix

@@ -23,13 +23,40 @@
         pkgs,
         system,
         ...
-      }: {
+      }: rec {
         # Per-system attributes can be defined here. The self' and inputs'
         # module parameters provide easy access to attributes of the same
         # system.
 
-        # Equivalent to  inputs'.nixpkgs.legacyPackages.hello;
+        packages.default = packages.console;
-        packages.default = pkgs.hello;
+
+        packages.console = with pkgs;
+          buildDotnetModule {
+            pname = "dotnet-nix-testing";
+            version = "0.1";
+
+            src = ./.;
+
+            projectFile = "dotnet-nix-testing.sln";
+            # nugetDeps = ./deps.json; # see "Generating and updating NuGet dependencies" section for details
+
+            # buildInputs = [
+            #   referencedProject
+            # ]; # `referencedProject` must contain `nupkg` in the folder structure.
+
+            dotnet-sdk = dotnetCorePackages.sdk_9_0;
+            dotnet-runtime = dotnetCorePackages.runtime_9_0;
+
+            executables = ["console"]; # This wraps "$out/lib/$pname/foo" to `$out/bin/foo`.
+            # executables = []; # Don't install any executables.
+
+            # packNupkg = true; # This packs the project as "foo-0.1.nupkg" at `$out/share`.
+
+            # runtimeDeps = [ffmpeg]; # This will wrap ffmpeg's library path into `LD_LIBRARY_PATH`.
+
+            meta.mainProgram = "console";
+          };
+
         devShells.default = with pkgs;
           mkShell
           {
@@ -38,7 +65,6 @@
               (
                 with dotnetCorePackages;
                   combinePackages [
-                    sdk_8_0
                     sdk_9_0
                   ]
               )