可空性微调

Author: EzrealJ

WebApiClientCore.Test/Implementations/Tasks/ActionRetryTaskTest.cs

@@ -8,11 +8,11 @@ namespace WebApiClientCore.Test.Implementations.Tasks
 {
     public class ActionRetryTaskTest
     {
-        class ResultApiTask<T> : TaskBase<T>  
+        class ResultApiTask<T> : TaskBase<T?>  
         {
             public T? Result { get; set; }
 
-            protected override Task<T> InvokeAsync()
+            protected override Task<T?> InvokeAsync()
             {
                 return Task.FromResult(Result);
             }

WebApiClientCore/DependencyInjection/NamedHttpApiExtensions.cs

@@ -21,8 +21,8 @@ internal static void NamedHttpApiType(this IServiceCollection services, string n
             services.TryAddSingleton(new NameTypeRegistration());
             var descriptor = services.Single(item => item.ServiceType == typeof(NameTypeRegistration));
 
-            var registration = (NameTypeRegistration)descriptor.ImplementationInstance;
-            registration[name] = httpApiType;
+            var registration = (NameTypeRegistration?)descriptor.ImplementationInstance;
+            registration![name] = httpApiType;
         }
 
         /// <summary>
@@ -38,7 +38,11 @@ internal static void NamedHttpApiType(this IServiceCollection services, string n
                 return null;
             }
 
-            var registration = (NameTypeRegistration)descriptor.ImplementationInstance;
+            var registration = (NameTypeRegistration?)descriptor.ImplementationInstance;
+            if (registration == null)
+            {
+                return null;
+            }
             registration.TryGetValue(builder.Name, out var type);
             return type;
         }