Initial commit

Invitation.cs

@@ -0,0 +1,51 @@
+namespace Activities
+{
+    public class Invitation
+    {
+        public static string GetValue(string prompt)
+        {
+            Console.Write(prompt);
+            string? value = Console.ReadLine();
+            if (value == null)
+            {
+                Console.WriteLine("No input provided.");
+                value = GetValue(prompt);
+            }
+            return value;
+        }
+
+        public static DateOnly GetDate(string prompt)
+        {
+            string value = GetValue(prompt);
+            DateOnly date;
+            try
+            {
+                date = DateOnly.Parse(value);
+            }
+            catch
+            {
+                Console.WriteLine("Invalid date provided.");
+                date = GetDate(prompt);
+            }
+            return date;
+        }
+
+        public static bool GetResponse(string prompt)
+        {
+            string value = GetValue(prompt);
+            if (value.Equals("y", StringComparison.CurrentCultureIgnoreCase))
+            {
+                return true;
+            }
+            else if (value.Equals("n", StringComparison.CurrentCultureIgnoreCase))
+            {
+                return false;
+            }
+            else
+            {
+                Console.WriteLine("Invalid response provided.");
+                return GetResponse(prompt);
+            }
+        }
+    }
+}