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Framework/Util/StringValueUtils.cs

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+using System;
+using System.Collections.Concurrent;
+using System.Reflection;
+
+namespace Kreta.Framework.Util
+{
+    public static class StringValueUtils
+    {
+        private static readonly ConcurrentDictionary<Enum, string> values = new ConcurrentDictionary<Enum, string>();
+
+        public static string GetStringValue(this Enum key)
+        {
+            return values.GetOrAdd(key, k =>
+                k.GetType()
+                .GetMember(k.ToString())[0]
+                .GetCustomAttribute<StringValueAttribute>()?
+                .Value);
+        }
+    }
+}