diff --git a/csharp/ApprovalTest.cs b/csharp/ApprovalTest.cs
new file mode 100644
index 00000000..2710c604
--- /dev/null
+++ b/csharp/ApprovalTest.cs
@@ -0,0 +1,30 @@
+using System;
+using System.IO;
+using System.Text;
+using NUnit.Framework;
+
+namespace csharp
+{
+    [TestFixture]
+    public class ApprovalTest
+    {
+        [Test]
+        public void ThirtyDays()
+        {
+            var lines = File.ReadAllLines("ThirtyDays.txt");
+
+            StringBuilder fakeoutput = new StringBuilder();
+            Console.SetOut(new StringWriter(fakeoutput));
+            Console.SetIn(new StringReader("a\n"));
+
+            Program.Main(new string[] { });
+            String output = fakeoutput.ToString();
+
+            var outputLines = output.Split('\n');
+            for(var i = 0; i<Math.Min(lines.Length, outputLines.Length); i++) 
+            {
+                Assert.AreEqual(lines[i], outputLines[i]);
+            }
+        }
+    }
+}
diff --git a/csharp/ThirtyDays.txt b/csharp/ThirtyDays.txt
new file mode 100644
index 00000000..cd66984f
--- /dev/null
+++ b/csharp/ThirtyDays.txt
@@ -0,0 +1,373 @@
+OMGHAI!
+-------- day 0 --------
+name, sellIn, quality
++5 Dexterity Vest, 10, 20
+Aged Brie, 2, 0
+Elixir of the Mongoose, 5, 7
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 15, 20
+Backstage passes to a TAFKAL80ETC concert, 10, 49
+Backstage passes to a TAFKAL80ETC concert, 5, 49
+Conjured Mana Cake, 3, 6
+
+-------- day 1 --------
+name, sellIn, quality
++5 Dexterity Vest, 9, 19
+Aged Brie, 1, 1
+Elixir of the Mongoose, 4, 6
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 14, 21
+Backstage passes to a TAFKAL80ETC concert, 9, 50
+Backstage passes to a TAFKAL80ETC concert, 4, 50
+Conjured Mana Cake, 2, 5
+
+-------- day 2 --------
+name, sellIn, quality
++5 Dexterity Vest, 8, 18
+Aged Brie, 0, 2
+Elixir of the Mongoose, 3, 5
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 13, 22
+Backstage passes to a TAFKAL80ETC concert, 8, 50
+Backstage passes to a TAFKAL80ETC concert, 3, 50
+Conjured Mana Cake, 1, 4
+
+-------- day 3 --------
+name, sellIn, quality
++5 Dexterity Vest, 7, 17
+Aged Brie, -1, 4
+Elixir of the Mongoose, 2, 4
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 12, 23
+Backstage passes to a TAFKAL80ETC concert, 7, 50
+Backstage passes to a TAFKAL80ETC concert, 2, 50
+Conjured Mana Cake, 0, 3
+
+-------- day 4 --------
+name, sellIn, quality
++5 Dexterity Vest, 6, 16
+Aged Brie, -2, 6
+Elixir of the Mongoose, 1, 3
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 11, 24
+Backstage passes to a TAFKAL80ETC concert, 6, 50
+Backstage passes to a TAFKAL80ETC concert, 1, 50
+Conjured Mana Cake, -1, 1
+
+-------- day 5 --------
+name, sellIn, quality
++5 Dexterity Vest, 5, 15
+Aged Brie, -3, 8
+Elixir of the Mongoose, 0, 2
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 10, 25
+Backstage passes to a TAFKAL80ETC concert, 5, 50
+Backstage passes to a TAFKAL80ETC concert, 0, 50
+Conjured Mana Cake, -2, 0
+
+-------- day 6 --------
+name, sellIn, quality
++5 Dexterity Vest, 4, 14
+Aged Brie, -4, 10
+Elixir of the Mongoose, -1, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 9, 27
+Backstage passes to a TAFKAL80ETC concert, 4, 50
+Backstage passes to a TAFKAL80ETC concert, -1, 0
+Conjured Mana Cake, -3, 0
+
+-------- day 7 --------
+name, sellIn, quality
++5 Dexterity Vest, 3, 13
+Aged Brie, -5, 12
+Elixir of the Mongoose, -2, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 8, 29
+Backstage passes to a TAFKAL80ETC concert, 3, 50
+Backstage passes to a TAFKAL80ETC concert, -2, 0
+Conjured Mana Cake, -4, 0
+
+-------- day 8 --------
+name, sellIn, quality
++5 Dexterity Vest, 2, 12
+Aged Brie, -6, 14
+Elixir of the Mongoose, -3, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 7, 31
+Backstage passes to a TAFKAL80ETC concert, 2, 50
+Backstage passes to a TAFKAL80ETC concert, -3, 0
+Conjured Mana Cake, -5, 0
+
+-------- day 9 --------
+name, sellIn, quality
++5 Dexterity Vest, 1, 11
+Aged Brie, -7, 16
+Elixir of the Mongoose, -4, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 6, 33
+Backstage passes to a TAFKAL80ETC concert, 1, 50
+Backstage passes to a TAFKAL80ETC concert, -4, 0
+Conjured Mana Cake, -6, 0
+
+-------- day 10 --------
+name, sellIn, quality
++5 Dexterity Vest, 0, 10
+Aged Brie, -8, 18
+Elixir of the Mongoose, -5, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 5, 35
+Backstage passes to a TAFKAL80ETC concert, 0, 50
+Backstage passes to a TAFKAL80ETC concert, -5, 0
+Conjured Mana Cake, -7, 0
+
+-------- day 11 --------
+name, sellIn, quality
++5 Dexterity Vest, -1, 8
+Aged Brie, -9, 20
+Elixir of the Mongoose, -6, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 4, 38
+Backstage passes to a TAFKAL80ETC concert, -1, 0
+Backstage passes to a TAFKAL80ETC concert, -6, 0
+Conjured Mana Cake, -8, 0
+
+-------- day 12 --------
+name, sellIn, quality
++5 Dexterity Vest, -2, 6
+Aged Brie, -10, 22
+Elixir of the Mongoose, -7, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 3, 41
+Backstage passes to a TAFKAL80ETC concert, -2, 0
+Backstage passes to a TAFKAL80ETC concert, -7, 0
+Conjured Mana Cake, -9, 0
+
+-------- day 13 --------
+name, sellIn, quality
++5 Dexterity Vest, -3, 4
+Aged Brie, -11, 24
+Elixir of the Mongoose, -8, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 2, 44
+Backstage passes to a TAFKAL80ETC concert, -3, 0
+Backstage passes to a TAFKAL80ETC concert, -8, 0
+Conjured Mana Cake, -10, 0
+
+-------- day 14 --------
+name, sellIn, quality
++5 Dexterity Vest, -4, 2
+Aged Brie, -12, 26
+Elixir of the Mongoose, -9, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 1, 47
+Backstage passes to a TAFKAL80ETC concert, -4, 0
+Backstage passes to a TAFKAL80ETC concert, -9, 0
+Conjured Mana Cake, -11, 0
+
+-------- day 15 --------
+name, sellIn, quality
++5 Dexterity Vest, -5, 0
+Aged Brie, -13, 28
+Elixir of the Mongoose, -10, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, 0, 50
+Backstage passes to a TAFKAL80ETC concert, -5, 0
+Backstage passes to a TAFKAL80ETC concert, -10, 0
+Conjured Mana Cake, -12, 0
+
+-------- day 16 --------
+name, sellIn, quality
++5 Dexterity Vest, -6, 0
+Aged Brie, -14, 30
+Elixir of the Mongoose, -11, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -1, 0
+Backstage passes to a TAFKAL80ETC concert, -6, 0
+Backstage passes to a TAFKAL80ETC concert, -11, 0
+Conjured Mana Cake, -13, 0
+
+-------- day 17 --------
+name, sellIn, quality
++5 Dexterity Vest, -7, 0
+Aged Brie, -15, 32
+Elixir of the Mongoose, -12, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -2, 0
+Backstage passes to a TAFKAL80ETC concert, -7, 0
+Backstage passes to a TAFKAL80ETC concert, -12, 0
+Conjured Mana Cake, -14, 0
+
+-------- day 18 --------
+name, sellIn, quality
++5 Dexterity Vest, -8, 0
+Aged Brie, -16, 34
+Elixir of the Mongoose, -13, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -3, 0
+Backstage passes to a TAFKAL80ETC concert, -8, 0
+Backstage passes to a TAFKAL80ETC concert, -13, 0
+Conjured Mana Cake, -15, 0
+
+-------- day 19 --------
+name, sellIn, quality
++5 Dexterity Vest, -9, 0
+Aged Brie, -17, 36
+Elixir of the Mongoose, -14, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -4, 0
+Backstage passes to a TAFKAL80ETC concert, -9, 0
+Backstage passes to a TAFKAL80ETC concert, -14, 0
+Conjured Mana Cake, -16, 0
+
+-------- day 20 --------
+name, sellIn, quality
++5 Dexterity Vest, -10, 0
+Aged Brie, -18, 38
+Elixir of the Mongoose, -15, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -5, 0
+Backstage passes to a TAFKAL80ETC concert, -10, 0
+Backstage passes to a TAFKAL80ETC concert, -15, 0
+Conjured Mana Cake, -17, 0
+
+-------- day 21 --------
+name, sellIn, quality
++5 Dexterity Vest, -11, 0
+Aged Brie, -19, 40
+Elixir of the Mongoose, -16, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -6, 0
+Backstage passes to a TAFKAL80ETC concert, -11, 0
+Backstage passes to a TAFKAL80ETC concert, -16, 0
+Conjured Mana Cake, -18, 0
+
+-------- day 22 --------
+name, sellIn, quality
++5 Dexterity Vest, -12, 0
+Aged Brie, -20, 42
+Elixir of the Mongoose, -17, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -7, 0
+Backstage passes to a TAFKAL80ETC concert, -12, 0
+Backstage passes to a TAFKAL80ETC concert, -17, 0
+Conjured Mana Cake, -19, 0
+
+-------- day 23 --------
+name, sellIn, quality
++5 Dexterity Vest, -13, 0
+Aged Brie, -21, 44
+Elixir of the Mongoose, -18, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -8, 0
+Backstage passes to a TAFKAL80ETC concert, -13, 0
+Backstage passes to a TAFKAL80ETC concert, -18, 0
+Conjured Mana Cake, -20, 0
+
+-------- day 24 --------
+name, sellIn, quality
++5 Dexterity Vest, -14, 0
+Aged Brie, -22, 46
+Elixir of the Mongoose, -19, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -9, 0
+Backstage passes to a TAFKAL80ETC concert, -14, 0
+Backstage passes to a TAFKAL80ETC concert, -19, 0
+Conjured Mana Cake, -21, 0
+
+-------- day 25 --------
+name, sellIn, quality
++5 Dexterity Vest, -15, 0
+Aged Brie, -23, 48
+Elixir of the Mongoose, -20, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -10, 0
+Backstage passes to a TAFKAL80ETC concert, -15, 0
+Backstage passes to a TAFKAL80ETC concert, -20, 0
+Conjured Mana Cake, -22, 0
+
+-------- day 26 --------
+name, sellIn, quality
++5 Dexterity Vest, -16, 0
+Aged Brie, -24, 50
+Elixir of the Mongoose, -21, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -11, 0
+Backstage passes to a TAFKAL80ETC concert, -16, 0
+Backstage passes to a TAFKAL80ETC concert, -21, 0
+Conjured Mana Cake, -23, 0
+
+-------- day 27 --------
+name, sellIn, quality
++5 Dexterity Vest, -17, 0
+Aged Brie, -25, 50
+Elixir of the Mongoose, -22, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -12, 0
+Backstage passes to a TAFKAL80ETC concert, -17, 0
+Backstage passes to a TAFKAL80ETC concert, -22, 0
+Conjured Mana Cake, -24, 0
+
+-------- day 28 --------
+name, sellIn, quality
++5 Dexterity Vest, -18, 0
+Aged Brie, -26, 50
+Elixir of the Mongoose, -23, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -13, 0
+Backstage passes to a TAFKAL80ETC concert, -18, 0
+Backstage passes to a TAFKAL80ETC concert, -23, 0
+Conjured Mana Cake, -25, 0
+
+-------- day 29 --------
+name, sellIn, quality
++5 Dexterity Vest, -19, 0
+Aged Brie, -27, 50
+Elixir of the Mongoose, -24, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -14, 0
+Backstage passes to a TAFKAL80ETC concert, -19, 0
+Backstage passes to a TAFKAL80ETC concert, -24, 0
+Conjured Mana Cake, -26, 0
+
+-------- day 30 --------
+name, sellIn, quality
++5 Dexterity Vest, -20, 0
+Aged Brie, -28, 50
+Elixir of the Mongoose, -25, 0
+Sulfuras, Hand of Ragnaros, 0, 80
+Sulfuras, Hand of Ragnaros, -1, 80
+Backstage passes to a TAFKAL80ETC concert, -15, 0
+Backstage passes to a TAFKAL80ETC concert, -20, 0
+Backstage passes to a TAFKAL80ETC concert, -25, 0
+Conjured Mana Cake, -27, 0
+
diff --git a/csharp/csharp.csproj b/csharp/csharp.csproj
index 1da4c94e..6db531b6 100644
--- a/csharp/csharp.csproj
+++ b/csharp/csharp.csproj
@@ -61,6 +61,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="ApprovalTest.cs" />
     <Compile Include="GildedRose.cs" />
     <Compile Include="GildedRoseTest.cs" />
     <Compile Include="Item.cs" />
@@ -74,6 +75,11 @@
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="ThirtyDays.txt">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>