From 48ff06d26e93918fa8f0734e31c7e72d1bfd4fb0 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Mon, 22 Mar 2021 21:24:30 +0100
Subject: [PATCH] Add workflow context class type constraint

---
 .../Elsa.Abstractions/Services/WorkflowContextRefresher.cs    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/Elsa.Abstractions/Services/WorkflowContextRefresher.cs b/src/core/Elsa.Abstractions/Services/WorkflowContextRefresher.cs
index c7643d0d1..388f77f01 100644
--- a/src/core/Elsa.Abstractions/Services/WorkflowContextRefresher.cs
+++ b/src/core/Elsa.Abstractions/Services/WorkflowContextRefresher.cs
@@ -13,11 +13,11 @@ namespace Elsa.Services
         public virtual ValueTask<object?> LoadAsync(LoadWorkflowContext context, CancellationToken cancellationToken = default) => new();
     }
     
-    public abstract class WorkflowContextRefresher<T> : ILoadWorkflowContext, ISaveWorkflowContext
+    public abstract class WorkflowContextRefresher<T> : ILoadWorkflowContext, ISaveWorkflowContext where T:class
     {
         public virtual IEnumerable<Type> SupportedTypes => new[] { typeof(T) };
         ValueTask<string?> ISaveWorkflowContext.SaveAsync(SaveWorkflowContext context, CancellationToken cancellationToken) => SaveAsync(new SaveWorkflowContext<T>(context), cancellationToken);
-        async ValueTask<object?> ILoadWorkflowContext.LoadAsync(LoadWorkflowContext context, CancellationToken cancellationToken) => (T)await LoadAsync(context, cancellationToken);
+        async ValueTask<object?> ILoadWorkflowContext.LoadAsync(LoadWorkflowContext context, CancellationToken cancellationToken) => await LoadAsync(context, cancellationToken);
         public virtual ValueTask<string?> SaveAsync(SaveWorkflowContext<T> context, CancellationToken cancellationToken = default) => new();
         public virtual ValueTask<T?> LoadAsync(LoadWorkflowContext context, CancellationToken cancellationToken) => new();
     }