add Programmyday form github

EvenOrOddExtention/EvenOrOddExtention.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

EvenOrOddExtention/Program.cs

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+namespace EvenOrOddExtention
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            int input = 105;
+            Console.WriteLine(input.EvenOrOdd());
+        }
+    }
+    static class EvenOrOddExtention
+    {
+        public static string EvenOrOdd(this int input)
+        {
+            if (input % 2 != 0)
+            {
+                return "Odd";
+            }
+            return "Even";
+        }
+    }
+}