diff --git a/Calculator/calculator.cs b/Calculator/calculator.cs
new file mode 100644
index 0000000..96e2703
--- /dev/null
+++ b/Calculator/calculator.cs
@@ -0,0 +1,39 @@
+using System;
+
+namespace Calculator
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.Write("\nenter the first number: ");
+            double a = double.Parse(Console.ReadLine());
+            Console.Write("\nenter the second number: ");
+            double b = double.Parse(Console.ReadLine());
+
+            Console.Write("Select the operation to be perform\n(1) +\n(2) -\n(3) *\n(4) / \n");
+            int op = int.Parse(Console.ReadLine());
+
+            switch (op)
+            {
+                case 1:
+                    Console.WriteLine("result: " + (a + b));
+                    break;
+                case 2:
+                    Console.WriteLine("result: " + (a - b));
+                    break;
+                case 3:
+                    Console.WriteLine("result: " + (a * b));
+                    break;
+                case 4:
+                    Console.WriteLine("result: " + (a / b));
+                    break;
+                default:
+                    Console.WriteLine("wrong operation");
+                    break;
+            }
+
+            Console.ReadLine();
+        }
+    }
+}