Help link (from VS Error List to issue description web page).

Author: realvizu

source/NsDepCop.VisualStudioIntegration/IssueDescriptorExtensions.cs

@@ -1,11 +1,17 @@
-using Codartis.NsDepCop.Core.Analyzer.Roslyn;
+using System.Globalization;
+using Codartis.NsDepCop.Core.Analyzer.Roslyn;
 using Codartis.NsDepCop.Core.Common;
 using Microsoft.CodeAnalysis;
 
 namespace Codartis.NsDepCop.VisualStudioIntegration
 {
     public static class IssueDescriptorExtensions
     {
+        /// <summary>
+        /// Format string to create a help link for diagnostics. The parameter is the diagnostic's code in full UPPERCASE.
+        /// </summary>
+        private const string HELP_LINK_FORMAT = @"https://nsdepcop.codeplex.com/wikipage?title=Diagnostics#{0}";
+
         public static DiagnosticDescriptor ToDiagnosticDescriptor(this IssueDescriptor issueDescriptor)
         {
             return new DiagnosticDescriptor(
@@ -14,7 +20,13 @@ public static DiagnosticDescriptor ToDiagnosticDescriptor(this IssueDescriptor i
                 issueDescriptor.MessageFormat,
                 Constants.TOOL_NAME,
                 issueDescriptor.DefaultKind.ToDiagnosticSeverity(),
-                true);
+                true,
+                helpLinkUri: GetHelpLink(issueDescriptor.Id));
+        }
+
+        private static string GetHelpLink(string issueDescriptorId)
+        {
+            return string.Format(HELP_LINK_FORMAT, issueDescriptorId.ToUpper(CultureInfo.InvariantCulture));
         }
     }
 }

source/NsDepCop.VisualStudioIntegration/NsDepCopDiagnosticAnalyzer.cs

@@ -22,12 +22,14 @@ public class NsDepCopDiagnosticAnalyzer : DiagnosticAnalyzer
         /// <summary>
         /// Descriptor for the 'Illegal namespace dependency' diagnostic.
         /// </summary>
-        private static readonly DiagnosticDescriptor _illegalDependencyDescriptor = Constants.IllegalDependencyIssue.ToDiagnosticDescriptor();
+        private static readonly DiagnosticDescriptor _illegalDependencyDescriptor =
+            Constants.IllegalDependencyIssue.ToDiagnosticDescriptor();
 
         /// <summary>
         /// Descriptor for the 'Config exception' diagnostic.
         /// </summary>
-        private static readonly DiagnosticDescriptor _configExceptionDescriptor = Constants.ConfigExceptionIssue.ToDiagnosticDescriptor();
+        private static readonly DiagnosticDescriptor _configExceptionDescriptor = 
+            Constants.ConfigExceptionIssue.ToDiagnosticDescriptor();
 
         public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
         {
@@ -113,7 +115,9 @@ private Diagnostic CreateIllegalDependencyDiagnostic(SyntaxNode node, Dependency
                 defaultSeverity: _illegalDependencyDescriptor.DefaultSeverity,
                 isEnabledByDefault: true,
                 warningLevel: warningLevel,
-                location: Location.Create(node.SyntaxTree, node.Span));
+                location: Location.Create(node.SyntaxTree, node.Span),
+                helpLink: _illegalDependencyDescriptor.HelpLinkUri,
+                title: _illegalDependencyDescriptor.Title);
         }
 
         private void ReportConfigException(SyntaxNodeAnalysisContext context, Exception exception)