Initial commit.

.gitignore

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+*.swp
+*.*~
+project.lock.json
+.DS_Store
+*.pyc
+nupkg/
+
+# Visual Studio Code
+.vscode/*
+!.vscode/settings.json
+
+# Rider
+.idea/
+
+# Visual Studio
+.vs/
+
+# Fleet
+.fleet/
+
+# Code Rush
+.cr/
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+build/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+msbuild.log
+msbuild.err
+msbuild.wrn
+
+# Node.js build artifacts
+node_modules/
+package-lock.json
+package.json

TwelveDays.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36811.4 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TwelveDays", "TwelveDays\TwelveDays.csproj", "{7B73BA15-6348-493E-A70E-738F1D53D436}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7B73BA15-6348-493E-A70E-738F1D53D436}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7B73BA15-6348-493E-A70E-738F1D53D436}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7B73BA15-6348-493E-A70E-738F1D53D436}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7B73BA15-6348-493E-A70E-738F1D53D436}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {050C6306-C26E-4D49-8150-C37A010180A7}
+	EndGlobalSection
+EndGlobal

TwelveDays/Data.cs

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+namespace TwelveDays;
+
+public record Data
+{
+    public int Day { get; init; }
+    public string Gift { get; init; }
+    public string Context { get; init; }
+}

TwelveDays/Helpers.cs

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+namespace TwelveDays;
+
+internal class Helpers
+{
+    internal static List<string> Numerals => new List<string>
+    {
+        "a",
+        "two",
+        "three",
+        "four",
+        "five",
+        "six",
+        "seven",
+        "eight",
+        "nine",
+        "ten",
+        "eleven",
+        "twelve"
+    };
+
+    internal static List<string> Ordinals => new List<string>
+    {
+        "first",
+        "second",
+        "third",
+        "fourth",
+        "fifth",
+        "sixth",
+        "seventh",
+        "eighth",
+        "ninth",
+        "tenth",
+        "eleventh",
+        "twelfth"
+    };
+}
+

TwelveDays/Program.cs

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+using System.Text.Json;
+using TwelveDays;
+
+string fileName = "data.json";
+string jsonString = File.ReadAllText(fileName);
+List<Data> data = JsonSerializer.Deserialize<List<Data>>(jsonString)!;
+
+var giftLines = data
+    .Select(d => $"{Helpers.Numerals[d.Day - 1]} {d.Gift} {d.Context}".Trim());
+
+foreach(int day in Enumerable.Range(1, giftLines.Count()))
+{
+    Console.WriteLine($"On the {Helpers.Ordinals[day - 1]} day of Christmas my true love gave to me:");
+    foreach (var line in giftLines.Take(day).Reverse())
+    {
+        if (day > 1 && line == giftLines.First())
+            Console.Write("and ");
+
+        if(day == 5)
+            Console.WriteLine(line.ToUpper());
+        else
+            Console.WriteLine(line);
+    }
+    Console.WriteLine();
+}
+
+Console.WriteLine("Press any key to exit…");
+Console.Read();

TwelveDays/TwelveDays.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Update="data.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

TwelveDays/data.json

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+[
+  {
+    "Day": 1,
+    "Gift": "partridge",
+    "Context": "in a Pear Tree"
+  },
+  {
+    "Day": 2,
+    "Gift": "turtle doves",
+    "Context": ""
+  },
+  {
+    "Day": 3,
+    "Gift": "French hens",
+    "Context": ""
+  },
+  {
+    "Day": 4,
+    "Gift": "calling birds",
+    "Context": ""
+  },
+  {
+    "Day": 5,
+    "Gift": "gold rings",
+    "Context": ""
+  },
+  {
+    "Day": 6,
+    "Gift": "geese",
+    "Context": "a-laying"
+  },
+  {
+    "Day": 7,
+    "Gift": "swans",
+    "Context": "a-swimming"
+  },
+  {
+    "Day": 8,
+    "Gift": "maids",
+    "Context": "a-milking"
+  },
+  {
+    "Day": 9,
+    "Gift": "ladies",
+    "Context": "dancing"
+  },
+  {
+    "Day": 10,
+    "Gift": "lords",
+    "Context": "a-leaping"
+  },
+  {
+    "Day": 11,
+    "Gift": "pipers",
+    "Context": "piping"
+  },
+  {
+    "Day": 12,
+    "Gift": "drummers",
+    "Context": "drumming"
+  }
+]