first time include all file

CarParkValidationAPI/Helpers/Helper.cs

@@ -0,0 +1,25 @@
+using System;
+
+namespace CarParkValidationAPI.Helpers;
+
+public class Helper
+{
+    public static string DateToStr(DateTime? date)
+    {
+        string result = "";
+        if (date != null)
+          result  = date?.ToString("yyyy-MM-dd");
+        return result;
+    }
+
+    public static DateTime StrToDate(string date)
+    {
+        DateTime result = DateTime.Today;
+        if (DateTime.TryParse(date, out var dt))
+        {
+            result = dt;
+        }
+        return result;
+    }
+    
+}