Add methods to add multiple workflows from a given assembly

Elsa.sln

@@ -109,7 +109,7 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Email", "src\modules\E
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Workflows.Designer", "src\modules\Elsa.Workflows.Designer\Elsa.Workflows.Designer.csproj", "{B191F11D-583D-44D9-8A08-F5B0DC58B822}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Samples.HelloWorld", "src\samples\aspnet\Elsa.Samples.HelloWorld\Elsa.Samples.HelloWorld.csproj", "{DF8CCA17-6B00-42C6-B4EC-61B42AA91EE0}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Samples.AspNet.HelloWorld", "src\samples\aspnet\Elsa.Samples.AspNet.HelloWorld\Elsa.Samples.AspNet.HelloWorld.csproj", "{DF8CCA17-6B00-42C6-B4EC-61B42AA91EE0}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Testing.Shared", "src\common\Elsa.Testing.Shared\Elsa.Testing.Shared.csproj", "{AD8C4BB0-C78F-496C-B326-1D82C02C7568}"
 EndProject

src/modules/Elsa.Workflows.Management/Features/WorkflowManagementFeature.cs

@@ -87,7 +87,7 @@ public class WorkflowManagementFeature : FeatureBase
     public WorkflowManagementFeature AddActivitiesFrom<TMarker>()
     {
         var activityTypes = typeof(TMarker).Assembly.GetExportedTypes()
-            .Where(x => typeof(IActivity).IsAssignableFrom(x) && !x.IsAbstract && !x.IsInterface && !x.IsGenericType)
+            .Where(x => typeof(IActivity).IsAssignableFrom(x) && x is { IsAbstract: false, IsInterface: false, IsGenericType: false })
             .ToList();
         return AddActivities(activityTypes);
     }

src/modules/Elsa.Workflows.Runtime/Extensions/ModuleExtensions.cs

@@ -1,3 +1,4 @@
+using System.Reflection;
 using Elsa.Features.Services;
 using Elsa.Workflows.Core.Contracts;
 using Elsa.Workflows.Runtime.Features;
@@ -37,6 +38,20 @@ public static class ModuleExtensions
         module.Configure<WorkflowRuntimeFeature>().AddWorkflow<T>();
         return module;
     }
+
+    /// <summary>
+    /// Register all workflows contained in the assembly containing the specified marker type.
+    /// </summary>
+    public static IModule AddWorkflowsFrom<TMarker>(this IModule module) => module.AddWorkflowsFrom(typeof(TMarker).Assembly);
+    
+    /// <summary>
+    /// Register all workflows in the specified assembly.
+    /// </summary>
+    public static IModule AddWorkflowsFrom(this IModule module, Assembly assembly)
+    {
+        module.Configure<WorkflowRuntimeFeature>().AddWorkflowsFrom(assembly);
+        return module;
+    }
     
     /// <summary>
     /// Configures the default workflow runtime.

src/modules/Elsa.Workflows.Runtime/Extensions/WorkflowDictionaryExtensions.cs

@@ -12,9 +12,24 @@ public static class WorkflowDictionaryExtensions
     /// <summary>
     /// Register a workflow factory that creates an instance of the specified workflow type. 
     /// </summary>
-    public static void Add<TWorkflow>(this IDictionary<string, Func<IServiceProvider, ValueTask<IWorkflow>>> dictionary) where TWorkflow : IWorkflow => dictionary.Add(typeof(TWorkflow).Name, sp =>
+    public static void Add<TWorkflow>(this IDictionary<string, Func<IServiceProvider, ValueTask<IWorkflow>>> dictionary) where TWorkflow : IWorkflow
     {
-        var workflow = ActivatorUtilities.GetServiceOrCreateInstance<TWorkflow>(sp);
-        return new ValueTask<IWorkflow>(workflow);
-    });
+        dictionary.Add(typeof(TWorkflow).Name, sp =>
+        {
+            var workflow = ActivatorUtilities.GetServiceOrCreateInstance<TWorkflow>(sp);
+            return new ValueTask<IWorkflow>(workflow);
+        });
+    }
+    
+    /// <summary>
+    /// Register a workflow factory that creates an instance of the specified workflow type. 
+    /// </summary>
+    public static void Add(this IDictionary<string, Func<IServiceProvider, ValueTask<IWorkflow>>> dictionary, Type workflowType)
+    {
+        dictionary.Add(workflowType.Name, sp =>
+        {
+            var workflow = (IWorkflow)ActivatorUtilities.GetServiceOrCreateInstance(sp, workflowType);
+            return new ValueTask<IWorkflow>(workflow);
+        });
+    }
 }

src/modules/Elsa.Workflows.Runtime/Features/WorkflowRuntimeFeature.cs

@@ -1,3 +1,4 @@
+using System.Reflection;
 using Elsa.Common.Features;
 using Elsa.Extensions;
 using Elsa.Features.Abstractions;
@@ -99,6 +100,21 @@ public class WorkflowRuntimeFeature : FeatureBase
         Workflows.Add<T>();
         return this;
     }
+    
+    /// <summary>
+    /// Register all workflows in the specified assembly.
+    /// </summary>
+    public WorkflowRuntimeFeature AddWorkflowsFrom(Assembly assembly)
+    {
+        var workflowTypes = assembly.GetExportedTypes()
+            .Where(x => typeof(IWorkflow).IsAssignableFrom(x) && x is { IsAbstract: false, IsInterface: false, IsGenericType: false })
+            .ToList();
+        
+        foreach (var workflowType in workflowTypes)
+            Workflows.Add(workflowType);
+        
+        return this;
+    }
 
     /// <inheritdoc />
     public override void Configure()

src/samples/aspnet/Elsa.Samples.AspNet.HelloWorld/HelloWorldHttpWorkflow.cs

@@ -4,7 +4,7 @@ using Elsa.Workflows.Core.Abstractions;
 using Elsa.Workflows.Core.Activities;
 using Elsa.Workflows.Core.Contracts;
 
-namespace Elsa.Samples.HelloWorld;
+namespace Elsa.Samples.AspNet.HelloWorld;
 
 public class HelloWorldHttpWorkflow : WorkflowBase
 {

src/samples/aspnet/Elsa.Samples.AspNet.HelloWorld/Program.cs

@@ -1,17 +1,11 @@
 using Elsa.Extensions;
-using Elsa.Samples.HelloWorld;
 
 var builder = WebApplication.CreateBuilder(args);
 var services = builder.Services;
 
 // Add Elsa services.
 services.AddElsa(elsa => elsa
-    // Configure the workflow runtime.
-    .UseWorkflowRuntime(runtime =>
-    {
-        // Register our HTTP workflow with the runtime.
-        runtime.AddWorkflow<HelloWorldHttpWorkflow>();
-    })
+    .AddWorkflowsFrom<Program>()
         
     // Enable Elsa HTTP module (for HTTP related activities). 
     .UseHttp()