Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/monodoc/Monodoc/Provider.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace Monodoc
+{
+	public abstract class Provider
+	{
+		//
+		// This code is used to "tag" all the different sources
+		//
+		static short serial;
+
+		public int Code { get; set; }
+
+		public Provider ()
+		{
+			Code = serial++;
+		}
+
+		public abstract void PopulateTree (Tree tree);
+
+		//
+		// Called at shutdown time after the tree has been populated to perform
+		// any fixups or final tasks.
+		//
+		public abstract void CloseTree (HelpSource hs, Tree tree);
+	}
+}