Start adding enum helpers

SabreTools.Core/MappingAttribute.cs

@@ -0,0 +1,24 @@
+using System;
+
+namespace SabreTools.Core
+{
+    /// <summary>
+    /// Maps a set of strings to an enum value
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
+    public class MappingAttribute : Attribute
+    {
+        /// <summary>
+        /// Set of mapping strings
+        /// </summary>
+        public string[] Mappings { get; private set; }
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        public MappingAttribute(params string[] mappings)
+        {
+            this.Mappings = mappings;
+        }
+    }
+}