diff --git a/sample/CountryData.Sample.Console/Program.cs b/sample/CountryData.Sample.Console/Program.cs
index f8793bc..5bc35b3 100644
--- a/sample/CountryData.Sample.Console/Program.cs
+++ b/sample/CountryData.Sample.Console/Program.cs
@@ -1,167 +1,194 @@
-using CountryData.Standard;
+
+using CountryData.Standard;
 
-namespace CountryData.Sample.CountryConsoleProject
+/// <summary>
+/// Main program class for demonstrating the use of the CountryData library.
+/// </summary>
+public static class Program
 {
     /// <summary>
-    /// Main program class for demonstrating the use of the CountryData library.
+    /// Static instance of CountryHelper used throughout the program.
     /// </summary>
-    public static class Program
+    private static readonly CountryHelper _helper = new CountryHelper();
+
+
+    /// <summary>
+    /// Entry point of the program.
+    /// </summary>
+    public static void Main()
     {
-        /// <summary>
-        /// Static instance of CountryHelper used throughout the program.
-        /// </summary>
-        private static readonly CountryHelper _helper = new CountryHelper();
-
-        /// <summary>
-        /// Entry point of the program.
-        /// </summary>
-        public static void Main()
-        {
-            GetCountries();
-            GetCountryByCode("US");
-            GetCountryData();
-            GetRegionsByCountryCode("US");
-            GetCountryFlag("US");
-            GetPhoneCodeByCountryShortCode("AF");
-            GetCountryByPhoneCode("+233");
-            GetCurrencyCodesByCountryCode("US");
-            GetCountryByCurrencyCode("GHS");
-            GetCountryCode("Ghana");
-        }
+        GetCountries();
+        GetCountryByCode("US");
+        GetCountryData();
+        GetRegionsByCountryCode("US");
+        GetCountryFlag("US");
+        GetPhoneCodeByCountryShortCode("AF");
+        GetCountryByPhoneCode("+233");
+        GetCurrencyCodesByCountryCode("US");
+        GetCountryByCurrencyCode("GHS");
+        GetCountryCode("Ghana");
+        GetAllCurrencyCodesByCountryCode();
 
-        /// <summary>
-        /// Retrieves a list of all countries and prints them to the console.
-        /// </summary>
-        private static void GetCountries()
-        {
-            var countries = _helper.GetCountries();
-            Console.WriteLine("Countries:");
-            foreach (var country in countries)
-            {
-                Console.WriteLine(country);
-            }
-        }
 
-        /// <summary>
-        /// Retrieves the data for a given country code and prints it to the console.
-        /// </summary>
-        /// <param name="countryCode">The ISO country code.</param>
-        private static void GetCountryByCode(string countryCode)
-        {
-            var country = _helper.GetCountryByCode(countryCode);
-            Console.WriteLine($"Country data for {countryCode}:");
-            Console.WriteLine(country.CountryName);
-        }
+    }
 
-        /// <summary>
-        /// Retrieves comprehensive data for all countries and prints it to the console.
-        /// </summary>
-        private static void GetCountryData()
+    /// <summary>
+    /// Retrieves a list of all countries and prints them to the console.
+    /// </summary>
+    private static void GetCountries()
+    {
+        var countries = _helper.GetCountries();
+        Console.WriteLine("Countries:");
+        foreach (var country in countries)
         {
-            var countryData = _helper.GetCountryData();
-            Console.WriteLine("Country data:");
-            foreach (var data in countryData)
-            {
-                Console.WriteLine(data.CountryName);
-            }
+            Console.WriteLine(country);
         }
+    }
 
-        /// <summary>
-        /// Retrieves the regions for a given country code and prints them to the console.
-        /// </summary>
-        /// <param name="countryCode">The ISO country code.</param>
-        private static void GetRegionsByCountryCode(string countryCode)
-        {
-            var regions = _helper.GetRegionByCountryCode(countryCode);
-            Console.WriteLine($"Regions for {countryCode}:");
-            foreach (var region in regions)
-            {
-                Console.WriteLine(region.Name);
-            }
-        }
+    /// <summary>
+    /// Retrieves the data for a given country code and prints it to the console.
+    /// </summary>
+    /// <param name="countryCode">The ISO country code.</param>
+    private static void GetCountryByCode(string countryCode)
+    {
+        var country = _helper.GetCountryByCode(countryCode);
+        Console.WriteLine($"Country data for {countryCode}:");
+        Console.WriteLine(country.CountryName);
+    }
 
-        /// <summary>
-        /// Retrieves the emoji flag for a given country short code and prints it to the console.
-        /// </summary>
-        /// <param name="shortCode">The country short code.</param>
-        private static void GetCountryFlag(string shortCode)
+    /// <summary>
+    /// Retrieves comprehensive data for all countries and prints it to the console.
+    /// </summary>
+    private static void GetCountryData()
+    {
+        var countryData = _helper.GetCountryData();
+        Console.WriteLine("Country data:");
+        foreach (var data in countryData)
         {
-            var flag = _helper.GetCountryEmojiFlag(shortCode);
-            Console.WriteLine($"Flag for {shortCode}:");
-            Console.WriteLine(flag);
+            Console.WriteLine(data.CountryName);
         }
+    }
 
-        /// <summary>
-        /// Retrieves the phone code for a given country short code and prints it to the console.
-        /// </summary>
-        /// <param name="shortCode">The country short code.</param>
-        private static void GetPhoneCodeByCountryShortCode(string shortCode)
+    /// <summary>
+    /// Retrieves the regions for a given country code and prints them to the console.
+    /// </summary>
+    /// <param name="countryCode">The ISO country code.</param>
+    private static void GetRegionsByCountryCode(string countryCode)
+    {
+        var regions = _helper.GetRegionByCountryCode(countryCode);
+        Console.WriteLine($"Regions for {countryCode}:");
+        foreach (var region in regions)
         {
-            var phoneCode = _helper.GetPhoneCodeByCountryShortCode(shortCode);
-            Console.WriteLine($"Phone code for {shortCode}:");
-            Console.WriteLine(phoneCode);
+            Console.WriteLine(region.Name);
         }
+    }
 
-        /// <summary>
-        /// Retrieves the country name for a given phone code and prints it to the console.
-        /// </summary>
-        /// <param name="phoneCode">The phone code.</param>
-        private static void GetCountryByPhoneCode(string phoneCode)
+    /// <summary>
+    /// Retrieves the emoji flag for a given country short code and prints it to the console.
+    /// </summary>
+    /// <param name="shortCode">The country short code.</param>
+    private static void GetCountryFlag(string shortCode)
+    {
+        var flag = _helper.GetCountryEmojiFlag(shortCode);
+        Console.WriteLine($"Flag for {shortCode}:");
+        Console.WriteLine(flag);
+    }
+
+    /// <summary>
+    /// Retrieves the phone code for a given country short code and prints it to the console.
+    /// </summary>
+    /// <param name="shortCode">The country short code.</param>
+    private static void GetPhoneCodeByCountryShortCode(string shortCode)
+    {
+        var phoneCode = _helper.GetPhoneCodeByCountryShortCode(shortCode);
+        Console.WriteLine($"Phone code for {shortCode}:");
+        Console.WriteLine(phoneCode);
+    }
+
+    /// <summary>
+    /// Retrieves the country name for a given phone code and prints it to the console.
+    /// </summary>
+    /// <param name="phoneCode">The phone code.</param>
+    private static void GetCountryByPhoneCode(string phoneCode)
+    {
+        var countries = _helper.GetCountryByPhoneCode(phoneCode);
+        Console.WriteLine($"Country for phone code {phoneCode}:");
+        foreach (var country in countries)
         {
-            var countries = _helper.GetCountryByPhoneCode(phoneCode);
-            Console.WriteLine($"Country for phone code {phoneCode}:");
-            foreach (var country in countries)
-            {
-                Console.WriteLine(country.CountryName);
-            }
+            Console.WriteLine(country.CountryName);
         }
+    }
 
 
-        /// <summary>
-        /// Retrieves and prints the currency codes for a given country code.
-        /// </summary>
-        /// <param name="shortCode">The short country code to look up currency codes for.</param>
-        private static void GetCurrencyCodesByCountryCode(string shortCode)
+    /// <summary>
+    /// Retrieves and prints the currency codes for a given country code.
+    /// </summary>
+    /// <param name="shortCode">The short country code to look up currency codes for.</param>
+    private static void GetCurrencyCodesByCountryCode(string shortCode)
+    {
+        var currencyCodes = _helper.GetCurrencyCodesByCountryCode(shortCode);
+        Console.WriteLine($"Currency codes for {shortCode}:");
+        foreach (var currencyCode in currencyCodes)
         {
-            var currencyCodes = _helper.GetCurrencyCodesByCountryCode(shortCode);
-            Console.WriteLine($"Currency codes for {shortCode}:");
-            foreach (var currencyCode in currencyCodes)
-            {
-                Console.WriteLine(currencyCode.Code);
-            }
+            Console.WriteLine(currencyCode.Code);
         }
+    }
 
 
 
-        /// <summary>
-        /// Retrieves and prints the countries that use a given currency code.
-        /// </summary>
-        /// <param name="currencyCode">The currency code to look up countries for.</param>
-        private static void GetCountryByCurrencyCode(string currencyCode)
+    /// <summary>
+    /// Retrieves and prints the countries that use a given currency code.
+    /// </summary>
+    /// <param name="currencyCode">The currency code to look up countries for.</param>
+    private static void GetCountryByCurrencyCode(string currencyCode)
+    {
+        var countries = _helper.GetCountryByCurrencyCode(currencyCode);
+        Console.WriteLine($"Countries for currency code {currencyCode}:");
+        foreach (var country in countries)
         {
-            var countries = _helper.GetCountryByCurrencyCode(currencyCode);
-            Console.WriteLine($"Countries for currency code {currencyCode}:");
-            foreach (var country in countries)
-            {
-                Console.WriteLine(country.CountryName);
-            }
+            Console.WriteLine(country.CountryName);
         }
+    }
+
 
 
+    /// <summary>
+    /// Retrieves the country code for a given country name and prints it to the console.
+    /// </summary>
+    /// <param name="countryName">The name of the country.</param>
+    private static void GetCountryCode(string countryName)
+    {
+        using var manager = new CountryExtensions();
+        var result = manager.GetCountryCode(countryName);
+        Console.WriteLine($"Country code for {countryName} is {result} ");
+    }
 
-        /// <summary>
-        /// Retrieves the country code for a given country name and prints it to the console.
-        /// </summary>
-        /// <param name="countryName">The name of the country.</param>
-        private static void GetCountryCode(string countryName)
+
+    /// <summary>
+    ///  Prints the currency codes for all countries to the console.
+    /// </summary>
+    /// <param name="shortCode">The short country code to look up currency codes for.</param>
+
+    public static void GetAllCurrencyCodesByCountryCode()
+    {
+
+        var countryData = _helper.GetCountryData();
+        foreach (var data in countryData)
         {
-            using var manager = new CountryExtensions();
-            var result = manager.GetCountryCode(countryName);
-            Console.WriteLine($"Country code for {countryName} is {result} ");
-        }
+            var currencyCodes = _helper.GetCurrencyCodesByCountryCode(data.CountryShortCode);
+            Console.WriteLine($"Currency codes for {data.CountryShortCode}:");
+            foreach (var currencyCode in currencyCodes)
+            {
+                Console.WriteLine($"{currencyCode.Name}" + $"{currencyCode.Code}");
+            }
 
 
+        }
 
 
     }
+
 }
+
+
+
diff --git a/src/CountryData.Standard/Currency.cs b/src/CountryData.Standard/Currency.cs
index a4b5137..8ffa3d2 100644
--- a/src/CountryData.Standard/Currency.cs
+++ b/src/CountryData.Standard/Currency.cs
@@ -1,9 +1,8 @@
 namespace CountryData.Standard
 {
-     public class Currency
+    public class Currency
     {
-       public string Code { get; set; } 
+        public string Code { get; set; }
         public string Name { get; set; }
-        
     }
 }
diff --git a/src/CountryData.Standard/data.json b/src/CountryData.Standard/data.json
index c5de668..5dbb2d6 100644
--- a/src/CountryData.Standard/data.json
+++ b/src/CountryData.Standard/data.json
@@ -756,10 +756,18 @@
       }
     ]
   },
+
   {
     "countryName": "Antarctica",
     "countryShortCode": "AQ",
     "phoneCode": "+672",
+    "currency": [
+      {
+        "code": null,
+        "name": null
+      }
+    ],
+
     "regions": [
       {
         "name": "Antarctica",
@@ -767,6 +775,9 @@
       }
     ]
   },
+
+
+
   {
     "countryName": "Antigua and Barbuda",
     "countryShortCode": "AG",
@@ -2221,8 +2232,8 @@
     "phoneCode": "+47",
     "currency": [
       {
-        "code": "",
-        "name": ""
+        "code": "null",
+        "name": "null"
       }
     ],
     "regions": [
@@ -3019,7 +3030,7 @@
         "name": "Quebec",
         "shortCode": "QC"
       },
-      {
+      {bo
         "name": "Saskatchewan",
         "shortCode": "SK"
       },
@@ -6284,8 +6295,8 @@
         "shortCode": "SD"
       },
       {
-        "name": "Sud-Est",
-        "shortCode": "SE"
+        "name": "AUD",
+        "name": "Australian dollare": "SE"
       }
     ]
   },
@@ -6295,8 +6306,8 @@
    "phoneCode": "+672",
    "currency": [
       {
-        "code": "",
-        "name": ""
+        "code": "null",
+        "name": " null"
       }
     ],
     "regions": [
@@ -8159,8 +8170,8 @@
       {
         "name": "Tarawa"
       },
-      {
-        "name": "Teraina"
+      {KPW",
+        "name": "North Korean wonTeraina"
       }
     ]
   },
@@ -8170,8 +8181,8 @@
     "phoneCode": "+850",
     "currency": [
       {
-        "code": "",
-        "name": ""
+        "code": "null",
+        "name": "null"
       }
     ],
     "regions": [
@@ -16663,7 +16674,7 @@
         "name": "Saramacca",
         "shortCode": "SA"
       },
-      {
+      {Eswatini
         "name": "Sipaliwini",
         "shortCode": "SI"
       },
@@ -20555,8 +20566,8 @@
     "phoneCode":"+1340",
     "currency": [
       {
-        "code": "",
-        "name": ""
+        "code": "USD",
+        "name": "United States dollar"
       }
     ],
     "regions": [