Add HelpLinkUri to Roslyn analyzer diagnostics

src/Analyzers/Activities/FunctionNotFoundAnalyzer.cs

@@ -39,7 +39,8 @@ public sealed class FunctionNotFoundAnalyzer : DiagnosticAnalyzer
         AnalyzersCategories.Activity,
         DiagnosticSeverity.Warning,
         customTags: [WellKnownDiagnosticTags.CompilationEnd],
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{ActivityNotFoundDiagnosticId}");
 
     static readonly DiagnosticDescriptor SubOrchestrationNotFoundRule = new(
         SubOrchestrationNotFoundDiagnosticId,
@@ -48,7 +49,8 @@ public sealed class FunctionNotFoundAnalyzer : DiagnosticAnalyzer
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
         customTags: [WellKnownDiagnosticTags.CompilationEnd],
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{SubOrchestrationNotFoundDiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [ActivityNotFoundRule, SubOrchestrationNotFoundRule];

src/Analyzers/Activities/MatchingInputOutputTypeActivityAnalyzer.cs

@@ -40,7 +40,8 @@ public class MatchingInputOutputTypeActivityAnalyzer : DiagnosticAnalyzer
         AnalyzersCategories.Activity,
         DiagnosticSeverity.Warning,
         customTags: [WellKnownDiagnosticTags.CompilationEnd],
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{InputArgumentTypeMismatchDiagnosticId}");
 
     static readonly DiagnosticDescriptor OutputArgumentTypeMismatchRule = new(
         OutputArgumentTypeMismatchDiagnosticId,
@@ -49,7 +50,8 @@ public class MatchingInputOutputTypeActivityAnalyzer : DiagnosticAnalyzer
         AnalyzersCategories.Activity,
         DiagnosticSeverity.Warning,
         customTags: [WellKnownDiagnosticTags.CompilationEnd],
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{OutputArgumentTypeMismatchDiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [InputArgumentTypeMismatchRule, OutputArgumentTypeMismatchRule];

src/Analyzers/Functions/AttributeBinding/DurableClientBindingAnalyzer.cs

@@ -27,7 +27,8 @@ public sealed class DurableClientBindingAnalyzer : MatchingAttributeBindingAnaly
             MessageFormat,
             AnalyzersCategories.AttributeBinding,
             DiagnosticSeverity.Error,
-            isEnabledByDefault: true);
+            isEnabledByDefault: true,
+            helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Functions/AttributeBinding/EntityTriggerBindingAnalyzer.cs

@@ -27,7 +27,8 @@ public sealed class EntityTriggerBindingAnalyzer : MatchingAttributeBindingAnaly
             MessageFormat,
             AnalyzersCategories.AttributeBinding,
             DiagnosticSeverity.Error,
-            isEnabledByDefault: true);
+            isEnabledByDefault: true,
+            helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Functions/AttributeBinding/OrchestrationTriggerBindingAnalyzer.cs

@@ -27,7 +27,8 @@ public sealed class OrchestrationTriggerBindingAnalyzer : MatchingAttributeBindi
             MessageFormat,
             AnalyzersCategories.AttributeBinding,
             DiagnosticSeverity.Error,
-            isEnabledByDefault: true);
+            isEnabledByDefault: true,
+            helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Functions/Orchestration/CancellationTokenOrchestrationAnalyzer.cs

@@ -30,7 +30,8 @@ public class CancellationTokenOrchestrationAnalyzer : OrchestrationAnalyzer<Canc
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Functions/Orchestration/OtherBindingsOrchestrationAnalyzer.cs

@@ -30,7 +30,8 @@ class OtherBindingsOrchestrationAnalyzer : OrchestrationAnalyzer<OtherBindingsOr
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/DateTimeOrchestrationAnalyzer.cs

@@ -29,7 +29,8 @@ public sealed class DateTimeOrchestrationAnalyzer : OrchestrationAnalyzer<DateTi
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/DelayOrchestrationAnalyzer.cs

@@ -29,7 +29,8 @@ public class DelayOrchestrationAnalyzer : OrchestrationAnalyzer<DelayOrchestrati
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/EnvironmentOrchestrationAnalyzer.cs

@@ -31,7 +31,8 @@ public sealed class EnvironmentOrchestrationAnalyzer : OrchestrationAnalyzer<Env
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/GuidOrchestrationAnalyzer.cs

@@ -29,7 +29,8 @@ public sealed class GuidOrchestrationAnalyzer : OrchestrationAnalyzer<GuidOrches
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/IOOrchestrationAnalyzer.cs

@@ -30,7 +30,8 @@ public sealed class IOOrchestrationAnalyzer : OrchestrationAnalyzer<IOOrchestrat
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

src/Analyzers/Orchestration/ThreadTaskOrchestrationAnalyzer.cs

@@ -29,7 +29,8 @@ public sealed class ThreadTaskOrchestrationAnalyzer : OrchestrationAnalyzer<Thre
         MessageFormat,
         AnalyzersCategories.Orchestration,
         DiagnosticSeverity.Warning,
-        isEnabledByDefault: true);
+        isEnabledByDefault: true,
+        helpLinkUri: $"https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#{DiagnosticId}");
 
     /// <inheritdoc/>
     public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [Rule];

test/Analyzers.Tests/DiagnosticDescriptorTests.cs

@@ -0,0 +1,51 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System.Collections.Immutable;
+using System.Reflection;
+using Microsoft.CodeAnalysis.Diagnostics;
+using Microsoft.DurableTask.Analyzers.Activities;
+using Microsoft.DurableTask.Analyzers.Functions.AttributeBinding;
+using Microsoft.DurableTask.Analyzers.Functions.Orchestration;
+using Microsoft.DurableTask.Analyzers.Orchestration;
+
+namespace Microsoft.DurableTask.Analyzers.Tests;
+
+/// <summary>
+/// Tests to validate diagnostic descriptor properties.
+/// </summary>
+public class DiagnosticDescriptorTests
+{
+    [Theory]
+    [InlineData(typeof(DateTimeOrchestrationAnalyzer))]
+    [InlineData(typeof(GuidOrchestrationAnalyzer))]
+    [InlineData(typeof(DelayOrchestrationAnalyzer))]
+    [InlineData(typeof(ThreadTaskOrchestrationAnalyzer))]
+    [InlineData(typeof(IOOrchestrationAnalyzer))]
+    [InlineData(typeof(EnvironmentOrchestrationAnalyzer))]
+    [InlineData(typeof(CancellationTokenOrchestrationAnalyzer))]
+    [InlineData(typeof(OtherBindingsOrchestrationAnalyzer))]
+    [InlineData(typeof(OrchestrationTriggerBindingAnalyzer))]
+    [InlineData(typeof(DurableClientBindingAnalyzer))]
+    [InlineData(typeof(EntityTriggerBindingAnalyzer))]
+    [InlineData(typeof(MatchingInputOutputTypeActivityAnalyzer))]
+    [InlineData(typeof(FunctionNotFoundAnalyzer))]
+    public void AllDiagnosticDescriptorsHaveHelpLinkUri(Type analyzerType)
+    {
+        // Arrange
+        DiagnosticAnalyzer? analyzer = Activator.CreateInstance(analyzerType) as DiagnosticAnalyzer;
+        Assert.NotNull(analyzer);
+
+        ImmutableArray<Microsoft.CodeAnalysis.DiagnosticDescriptor> diagnostics = analyzer!.SupportedDiagnostics;
+        Assert.NotEmpty(diagnostics);
+
+        // Act & Assert
+        foreach (Microsoft.CodeAnalysis.DiagnosticDescriptor diagnostic in diagnostics)
+        {
+            Assert.NotNull(diagnostic.HelpLinkUri);
+            Assert.NotEmpty(diagnostic.HelpLinkUri);
+            Assert.StartsWith("https://learn.microsoft.com/azure/azure-functions/durable/durable-functions-code-constraints?tabs=csharp#", diagnostic.HelpLinkUri);
+            Assert.EndsWith(diagnostic.Id, diagnostic.HelpLinkUri);
+        }
+    }
+}