Initial commit

cs3/C_Sharp_3_4/Program.cs

@@ -0,0 +1,20 @@
+using System;
+namespace C_Sharp_3_4
+{
+    public class Program
+    {
+        static void Main(string[] args)
+        {
+            double n = 1, t = 1, pi = 0, s = 1;
+            while (Math.Abs(t) >= Math.Pow(10,-6))
+            {
+                pi += t;
+                n += 2;
+                s = -s;
+                t = s / n;
+            }
+            pi *= 4;
+            Console.WriteLine("pi={0}" ,pi);
+        }
+    }
+}