Update README.md

Author: tinohager

README.md

@@ -9,3 +9,17 @@ Install via Nuget Package Manager
 ```
 PM> Install-Package KdTree
 ```
+
+# Examples 
+
+## Find nearest point in two dimensions
+```cs
+
+var tree = new KdTree<float, int>(2, new FloatMath());
+var coords = new[] { 0.0f, 0.0f };
+tree.Add(new[] { 50.0f, 80.0f }, 100);
+tree.Add(new[] { 20.0f, 10.0f }, 200);
+
+var nodes = tree.GetNearestNeighbours(new[] { 30.0f, 20.0f }, 1);
+
+```