First day

Exercise1/StoreData/IAccount.cs

@@ -0,0 +1,22 @@
+namespace StoreData
+{
+    public interface IAccount
+    {
+        /// <summary>
+        /// Check the balance
+        /// </summary>
+        decimal Balance { get; }
+
+        /// <summary>
+        /// Add money to this account
+        /// </summary>
+        /// <param name="amount">The amount to add</param>
+        void Add(decimal amount);
+
+        /// <summary>
+        /// Remove money from this account
+        /// </summary>
+        /// <param name="amount">The amount to remove</param>
+        void Remove(decimal amount);
+    }
+}