Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/design/IHelpService.cs

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+//------------------------------------------------------------------------------
+// <copyright file="IHelpService.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel.Design {
+    using System.Runtime.Remoting;
+    using System.ComponentModel;
+
+    using System.Diagnostics;
+
+    using System;
+
+    /// <devdoc>
+    ///    <para> 
+    ///       Provides the Integrated Development Environment (IDE) help
+    ///       system with contextual information for the current task.</para>
+    /// </devdoc>
+    public interface IHelpService {
+        /// <devdoc>
+        ///    <para>Adds a context attribute to the document.</para>
+        /// </devdoc>
+        void AddContextAttribute(string name, string value, HelpKeywordType keywordType);
+        
+        /// <devdoc>
+        ///     Clears all existing context attributes from the document.
+        /// </devdoc>
+        void ClearContextAttributes();
+        
+        /// <devdoc>
+        ///     Creates a Local IHelpService to manage subcontexts.
+        /// </devdoc>
+        IHelpService CreateLocalContext(HelpContextType contextType);
+
+        /// <devdoc>
+        ///    <para>
+        ///       Removes a previously added context attribute.
+        ///    </para>
+        /// </devdoc>
+        void RemoveContextAttribute(string name, string value);
+        
+        /// <devdoc>
+        ///     Removes a context that was created with CreateLocalContext
+        /// </devdoc>
+        void RemoveLocalContext(IHelpService localContext);
+
+        /// <devdoc>
+        ///    <para>Shows the help topic that corresponds to the specified keyword.</para>
+        /// </devdoc>
+        void ShowHelpFromKeyword(string helpKeyword);
+
+        /// <devdoc>
+        ///    <para>
+        ///       Shows the help topic that corresponds with the specified Url and topic navigation ID.
+        ///    </para>
+        /// </devdoc>
+        void ShowHelpFromUrl(string helpUrl);
+    }
+}