Remove C# 10 feature codes.

samples/dotnetCampus.LargeAddressAware.Sample/Program.cs

@@ -1,11 +1,12 @@
 using System;
 
-namespace dotnetCampus.LargeAddressAware.Sample;
-
-internal class Program
+namespace dotnetCampus.LargeAddressAware.Sample
 {
-    static void Main(string[] args)
+    internal class Program
     {
-        Console.WriteLine("Hello World!");
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
     }
 }

src/dotnetCampus.LargeAddressAware/Program.cs

@@ -1,8 +1,10 @@
-namespace dotnetCampus.LargeAddressAware;
-
-internal static class Program
+namespace dotnetCampus.LargeAddressAware
 {
-    private static void Main()
+    internal static class Program
     {
+        private static void Main()
+        {
+
+        }
     }
 }