Rename namespace from Umbraco.Core.Resolving to Umbraco.Core.ObjectResolution

src/Umbraco.Core/ObjectResolution/Resolution.cs

@@ -0,0 +1,38 @@
+using System;
+
+namespace Umbraco.Core.ObjectResolution
+{
+
+
+
+	// notes: nothing in Resolving is thread-safe because everything should happen when the app is starting
+
+	internal class Resolution
+	{
+		public static event EventHandler Frozen;
+
+		/// <summary>
+		/// Gets a value indicating that resolution is frozen
+		/// </summary>
+		/// <remarks>
+		/// The internal setter is normally used for unit tests
+		/// </remarks>
+		public static bool IsFrozen { get; internal set; }
+
+		public static void EnsureNotFrozen()
+		{
+			if (Resolution.IsFrozen)
+				throw new InvalidOperationException("Resolution is frozen. It is not possible to modify resolvers once resolution is frozen.");
+		}
+
+		public static void Freeze()
+		{
+			if (Resolution.IsFrozen)
+				throw new InvalidOperationException("Resolution is frozen. It is not possible to freeze it again.");
+
+			IsFrozen = true;
+			if (Frozen != null)
+				Frozen(null, null);
+		}
+	}
+}