Update 1. B# vs C# vs Python.md

Add pattern matching feature concept

.content/1. B# vs C# vs Python.md

@@ -517,3 +517,25 @@ sum(left, right)
 </table>
 
 Note that a strict comparison is performed in the switch operator (in the case of types, this means that the branch matching the children type with the parent type will not be executed). In switch operator the first branch that meets the condition will be executed.
+
+More complex pattern matching sample in B#:
+
+```C#
+switch(val.GetType())
+{
+  case typeof(int32) when ((val > 10) && (val < 100)):
+  {
+    Console.WriteLine("Case 1");
+    break;
+  }
+  case typeof(int32) when ((val > 100) && (val < 1000)):
+  {
+    Console.WriteLine("Case 2");
+    break;
+  }
+  default:
+  {
+    throw new System.Exception("Error!");
+  }
+}
+```