diff --git a/src/core/Elsa.Core/Builders/WorkflowBuilderExtensions.cs b/src/core/Elsa.Core/Builders/CompositeActivityBuilderExtensions.cs
similarity index 78%
rename from src/core/Elsa.Core/Builders/WorkflowBuilderExtensions.cs
rename to src/core/Elsa.Core/Builders/CompositeActivityBuilderExtensions.cs
index b172bed1e..16041db8e 100644
--- a/src/core/Elsa.Core/Builders/WorkflowBuilderExtensions.cs
+++ b/src/core/Elsa.Core/Builders/CompositeActivityBuilderExtensions.cs
@@ -6,21 +6,21 @@ using Elsa.Services.Models;
 
 namespace Elsa.Builders
 {
-    public static class WorkflowBuilderExtensions
+    public static class CompositeActivityBuilderExtensions
     {
         public static IActivityBuilder StartWith(this ICompositeActivityBuilder builder, Action action) => builder.StartWith<Inline>(inline => inline.Set(x => x.Function, RunInline(action)));
 
         public static IActivityBuilder
-            StartWith(this IWorkflowBuilder builder, Action<ActivityExecutionContext> action) =>
+            StartWith(this ICompositeActivityBuilder builder, Action<ActivityExecutionContext> action) =>
             builder.StartWith<Inline>(inline => inline.Set(x => x.Function, RunInline(action)));
 
         public static IActivityBuilder StartWith(
-            this IWorkflowBuilder builder,
+            this ICompositeActivityBuilder builder,
             Func<ActivityExecutionContext, ValueTask> action) =>
             builder.StartWith<Inline>(inline => inline.Set(x => x.Function, RunInline(action)));
 
         public static IActivityBuilder StartWith(
-            this IWorkflowBuilder builder,
+            this ICompositeActivityBuilder builder,
             Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> action) =>
             builder.StartWith<Inline>(inline => inline.Set(x => x.Function, RunInline(action)));
 
@@ -39,30 +39,26 @@ namespace Elsa.Builders
             builder.SetVariable(variableName, value());
 
         private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(Action action) =>
-            context =>
+            _ =>
             {
                 action();
                 return new ValueTask<IActivityExecutionResult>(new DoneResult());
             };
 
-        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(
-            Action<ActivityExecutionContext> action) =>
+        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(Action<ActivityExecutionContext> action) =>
             context =>
             {
                 action(context);
                 return new ValueTask<IActivityExecutionResult>(new DoneResult());
             };
 
-        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(
-            Func<ActivityExecutionContext, ValueTask> action) =>
+        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(Func<ActivityExecutionContext, ValueTask> action) =>
             async context =>
             {
                 await action(context);
                 return new DoneResult();
             };
 
-        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(
-            Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> action) =>
-            async context => await action(context);
+        private static Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> RunInline(Func<ActivityExecutionContext, ValueTask<IActivityExecutionResult>> action) => async context => await action(context);
     }
 }
\ No newline at end of file