Rework: saving regions in dictionary

CLI/Program.cs

@@ -9,6 +9,7 @@ var serilogLogger = SetupSerilog();
 LogService.AddLogAdapter(new SerilogAdapter(serilogLogger));
 var logger = LogService.RegisterLogger(typeof(Program));
 
+logger.Information("Whoah... Hi!");
 
 Console.ReadKey(); // Hold console app open.
 return;

DotBased/Utilities/Culture.cs

@@ -5,7 +5,7 @@ namespace DotBased.Utilities;
 public static class Culture
 {
     private static List<CultureInfo> _sysCultures = new List<CultureInfo>();
-    private static List<RegionInfo> _regions = new List<RegionInfo>();
+    private static Dictionary<string, RegionInfo> _regions = new Dictionary<string, RegionInfo>();
 
     /// <summary>
     /// Get all system known cultures.
@@ -14,7 +14,6 @@ public static class Culture
     /// <returns>The list with <see cref="CultureInfo"/>'s the system knows</returns>
     public static IEnumerable<CultureInfo> GetSystemCultures()
     {
-        //TODO: Probally need some internal caching for this
         if (_sysCultures.Count == 0)
             _sysCultures = CultureInfo.GetCultures(CultureTypes.AllCultures).ToList();
         return _sysCultures;
@@ -25,10 +24,17 @@ public static class Culture
     /// </summary>
     /// <remarks>The list will internally be cached, clear the cache with the <see cref="ClearCached"/> function</remarks>
     /// <returns>A list with regions from the system</returns>
-    public static IEnumerable<RegionInfo> GetRegions()
+    public static Dictionary<string, RegionInfo> GetRegions()
     {
         if (_regions.Count == 0)
-            _regions = GetSystemCultures().Where(cul => !cul.IsNeutralCulture).Where(cul => cul.LCID != 0x7F).Select(x => new RegionInfo(x.Name)).ToList();
+        {
+            var cultureInfos = GetSystemCultures().Where(cul => !cul.IsNeutralCulture).Where(cul => cul.LCID != 0x7F);
+            foreach (var culture in cultureInfos)
+            {
+                var region = new RegionInfo(culture.Name);
+                _regions.Add(culture.Name, region);
+            }
+        }
         return _regions;
     }
 
@@ -62,13 +68,32 @@ public static class Culture
         /// </summary>
         /// <param name="amount">The amount to format</param>
         /// <param name="culture">The culture to be formatted in</param>
-        /// <returns></returns>
-        public static string AmountToCultureCurrency(double amount, CultureInfo culture) => string.Format(culture, "{0:C}", amount);
+        /// <returns>Formatted amount in the given culture format</returns>
+        public static string FormatAmountToCultureCurrency(double amount, CultureInfo culture) => string.Format(culture, "{0:C}", amount);
+
+        /// <summary>
+        /// Formats the amount to the culture which is found by the ISO currency symbol.
+        /// </summary>
+        /// <remarks>WIP & slow!</remarks>
+        /// <param name="amount">The amount to fomrat</param>
+        /// <param name="isoCurencySymbol">Three-character ISO 4217 currency symbol</param>
+        /// <returns>Formatted amount in the given ISO currency symbol</returns>
+        public static string FormatAmountFromIsoCurrency(double amount, string isoCurencySymbol)
+        {
+            var culture = CultureInfo.CurrentCulture;
+            var systemRegion = new RegionInfo(culture.Name);
+            if (systemRegion.ISOCurrencySymbol != isoCurencySymbol)
+            {
+                string? result = GetRegions().Where(x => x.Value.ISOCurrencySymbol == isoCurencySymbol).Select(x => x.Key).FirstOrDefault();
+                culture = GetSystemCultures().FirstOrDefault(x => x.Name == result);
+            }
+            return culture == null ? string.Empty : FormatAmountToCultureCurrency(amount, culture);
+        }
 
         /// <summary>
         /// Get a list of ISO 3 letter currency symbols.
         /// </summary>
         /// <returns>List with ISOCurrencySymbols</returns>
-        public static IEnumerable<string> GetIsoCurrencySymbols() => GetRegions().Select(x => x.ISOCurrencySymbol).Distinct().ToList();
+        public static IEnumerable<string> GetIsoCurrencySymbols() => GetRegions().Select(x => x.Value.ISOCurrencySymbol).Distinct().ToList();
     }
 }

README.md

@@ -1,2 +1,2 @@
 # DotBased
-A library
+Small library that i use in my projects.