diff --git a/domain-model.md b/domain-model.md
index 653f474..5fb105e 100644
--- a/domain-model.md
+++ b/domain-model.md
@@ -1 +1,28 @@
-#Domain Models In Here
\ No newline at end of file
+#Domain Models In Here
+
+```
+As a supermarket shopper,
+So that I can pay for products at checkout,
+I'd like to be able to know the total cost of items in my basket.
+```
+
+```
+As an organised individual,
+So that I can evaluate my shopping habits,
+I'd like to see an itemised receipt that includes the name and price of the products
+I bought as well as the quantity, and a total cost of my basket.
+```
+
+Class Item
+- Properties
+	string name;
+	double price;
+
+Class Basket
+- Properties
+	List<Item> items;
+- Methods
+	double GetTotal();
+		returns total cost of items in basket.
+	List<string> PrintReceipt();
+		returns a list of all the items in the basket, and their quantities. And the total cost. 
\ No newline at end of file
diff --git a/tdd-domain-modelling.CSharp.Main/Basket.cs b/tdd-domain-modelling.CSharp.Main/Basket.cs
new file mode 100644
index 0000000..2b6ad67
--- /dev/null
+++ b/tdd-domain-modelling.CSharp.Main/Basket.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace tdd_domain_modelling
+{
+    public class Basket
+{
+        public Dictionary<string, int> _items;
+
+        public Basket()
+        {
+            _items = new Dictionary<string, int>();
+        }
+
+        public Boolean AddItem(string key, int value)
+        {
+            if (!_items.ContainsKey(key)){
+                _items.Add(key, value);
+                return true;
+            }
+            return false;
+        }
+
+        public int Total()
+        {
+            int total = 0;
+            foreach (KeyValuePair<string, int> item in _items)
+            {
+                total += item.Value;
+            }
+            return total;
+        }
+}
+}
diff --git a/tdd-domain-modelling.CSharp.Test/BasketTests.cs b/tdd-domain-modelling.CSharp.Test/BasketTests.cs
new file mode 100644
index 0000000..740e880
--- /dev/null
+++ b/tdd-domain-modelling.CSharp.Test/BasketTests.cs
@@ -0,0 +1,45 @@
+using Microsoft.VisualStudio.TestPlatform.ObjectModel;
+using NUnit.Framework;
+using tdd_domain_modelling.CSharp.Main;
+
+namespace tdd_domain_modelling.CSharp.Test
+{
+    [TestFixture]
+    public class BasketTest
+    {
+        private Basket _basket;
+
+        [SetUp]
+        public void Setup()
+        {
+            _basket = new Basket();
+            _basket._items.Add("Milk", 2);
+        }
+
+        [Test]
+        public void TestReturnTrueIfItemIsNotInBasket()
+        {
+            Assert.IsTrue(_basket.AddItem("Eggs", 6));
+        }
+
+        [Test]
+        public void TestReturnFalseIfItemIsInBasket()
+        {
+            Assert.IsFalse(_basket.AddItem("Milk", 5));
+        }
+
+        [Test]
+        public void TestIfItemWasAdded()
+        {
+            Assert.IsTrue(_basket._items.ContainsKey("Milk"));
+        }
+
+        [Test]
+        public void TestTotalCostOfBasket()
+        {
+            _basket._items.Add("Eggs", 1);
+            Assert.AreEqual(3, _basket.Total());
+        }
+
+    }
+}
\ No newline at end of file