Resolve warnings in DotNetNuke.Syndication

DNN Platform/Library/Services/Syndication/RssHandler.cs

@@ -16,6 +16,7 @@ namespace DotNetNuke.Services.Syndication
     using DotNetNuke.Services.Search.Entities;
     using DotNetNuke.Services.Search.Internals;
 
+    /// <summary>An HTTP handler for serving an RSS feed.</summary>
     public class RssHandler : SyndicationHandlerBase
     {
         /// <inheritdoc />
@@ -99,7 +100,7 @@ protected override void OnPreRender(EventArgs ea)
         }
 
         /// <summary>Creates an RSS Item.</summary>
-        /// <param name="searchResult"></param>
+        /// <param name="searchResult">The search result to convert to an RSS item.</param>
         /// <returns>A new <see cref="GenericRssElement"/> instance.</returns>
         private GenericRssElement GetRssItem(SearchResult searchResult)
         {

DNN Platform/Library/Services/Syndication/SyndicationHandlerBase.cs

@@ -1,66 +1,59 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information
-namespace DotNetNuke.Services.Syndication
-{
-    using System.Web;
+namespace DotNetNuke.Services.Syndication
+{
+    using System.Web;
 
-    using DotNetNuke.Common;
-    using DotNetNuke.Common.Utilities;
+    using DotNetNuke.Common;
+    using DotNetNuke.Common.Utilities;
     using DotNetNuke.Entities.Portals;
 
-    public class SyndicationHandlerBase : GenericRssHttpHandlerBase
-    {
-        private int moduleId = Null.NullInteger;
-
-        private int tabId = Null.NullInteger;
-
-        public PortalSettings Settings
-        {
-            get
-            {
-                return Globals.GetPortalSettings();
-            }
-        }
-
-        public int TabId
-        {
-            get
-            {
-                if (this.tabId == Null.NullInteger && this.Request.QueryString["tabid"] != null)
-                {
-                    if (!int.TryParse(this.Request.QueryString["tabid"], out this.tabId))
-                    {
-                        this.tabId = Null.NullInteger;
-                    }
-                }
-
-                return this.tabId;
-            }
-        }
-
-        public int ModuleId
-        {
-            get
-            {
-                if (this.moduleId == Null.NullInteger && this.Request.QueryString["moduleid"] != null)
-                {
-                    if (!int.TryParse(this.Request.QueryString["moduleid"], out this.moduleId))
-                    {
-                        this.moduleId = Null.NullInteger;
-                    }
-                }
-
-                return this.moduleId;
-            }
-        }
-
-        public HttpRequest Request
-        {
-            get
-            {
-                return HttpContext.Current.Request;
-            }
-        }
-    }
-}
+    /// <summary>An HTTP handler for generating an RSS feed.</summary>
+    public class SyndicationHandlerBase : GenericRssHttpHandlerBase
+    {
+        private int moduleId = Null.NullInteger;
+
+        private int tabId = Null.NullInteger;
+
+        /// <summary>Gets the portal settings.</summary>
+        public PortalSettings Settings => Globals.GetPortalSettings();
+
+        /// <summary>Gets the tab ID of the request.</summary>
+        public int TabId
+        {
+            get
+            {
+                if (this.tabId == Null.NullInteger && this.Request.QueryString["tabid"] != null)
+                {
+                    if (!int.TryParse(this.Request.QueryString["tabid"], out this.tabId))
+                    {
+                        this.tabId = Null.NullInteger;
+                    }
+                }
+
+                return this.tabId;
+            }
+        }
+
+        /// <summary>Gets the module ID of the request.</summary>
+        public int ModuleId
+        {
+            get
+            {
+                if (this.moduleId == Null.NullInteger && this.Request.QueryString["moduleid"] != null)
+                {
+                    if (!int.TryParse(this.Request.QueryString["moduleid"], out this.moduleId))
+                    {
+                        this.moduleId = Null.NullInteger;
+                    }
+                }
+
+                return this.moduleId;
+            }
+        }
+
+        /// <summary>Gets the HTTP request.</summary>
+        public HttpRequest Request => HttpContext.Current.Request;
+    }
+}

DNN Platform/Syndication/DotNetNuke.Syndication.csproj

@@ -42,6 +42,7 @@
     <DocumentationFile>bin\DotNetNuke.Services.Syndication.xml</DocumentationFile>
     <NoWarn>1591</NoWarn>
     <LangVersion>7</LangVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -55,6 +56,7 @@
     <DocumentationFile>bin\DotNetNuke.Services.Syndication.xml</DocumentationFile>
     <Optimize>true</Optimize>
     <LangVersion>7</LangVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="DotNetNuke.Instrumentation">