Make all Implementation classes generic

samples/Microcharts/Charts/BarChart.cs

@@ -20,12 +20,12 @@ namespace Microcharts
     ///
     /// A bar chart.
     /// </summary>
-    public class BarChartImplementation : PointChartImplementation<IBarChart>
+    public class BarChartImplementation<T> : PointChartImplementation<T> where T : IBarChart
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="T:Microcharts.BarChart"/> class.
         /// </summary>
-        public BarChartImplementation(IBarChart control) : base(control)
+        public BarChartImplementation(T control) : base(control)
         {
             PointSize = 0;
         }

samples/Microcharts/Charts/PointChart.cs

@@ -17,13 +17,6 @@ namespace Microcharts
     {
     }
 
-    public class PointChartImplementation : PointChartImplementation<IPointChart>
-    {
-        public PointChartImplementation(IPointChart control) : base(control)
-        {
-        }
-    }
-
     /// <summary>
     /// ![chart](../images/Point.png)
     ///

samples/WpfSamplesHost/BarChart.cs

@@ -8,7 +8,7 @@ namespace SimpleControls.Wpf
     {
         public BarChart()
         {
-            InitImplementation(new BarChartImplementation(this));
+            InitImplementation(new BarChartImplementation<IBarChart>(this));
         }
     }
 }

samples/WpfSamplesHost/PointChart.cs

@@ -8,7 +8,7 @@ namespace SimpleControls.Wpf
     {
         public PointChart()
         {
-            InitImplementation(new PointChartImplementation(this));
+            InitImplementation(new PointChartImplementation<IPointChart>(this));
         }
     }
 }