Part 1 & 2

Buckets.Logic/Container.cs

@@ -0,0 +1,32 @@
+namespace Buckets.Logic
+{
+    public abstract class Container
+    {
+        private int content;
+
+        public int Capacity { get; }
+        public int Content {get => content; set { ArgumentOutOfRangeException.ThrowIfNegative(value, nameof(Content)); ArgumentOutOfRangeException.ThrowIfGreaterThan(value, Capacity, nameof(Content)); content = value; } }
+
+        public Container(int capacity, int content)
+        {
+            ArgumentOutOfRangeException.ThrowIfNegative(capacity, nameof(Capacity));
+            Capacity = capacity;
+            Content = content;
+        }
+
+        public void Fill(int amount)
+        {
+            Content += amount;
+        }
+
+        public void Empty(int amount)
+        {
+            Content -= amount;
+        }
+
+        public void Empty()
+        {
+            Content = 0;
+        }
+    }
+}