Resolve ILLink warnings in Microsoft.Extensions.Hosting (#55048)

Author: eerhardt

src/libraries/Microsoft.Extensions.Hosting/src/ILLink/ILLink.Suppressions.xml

@@ -10,6 +10,8 @@ namespace Microsoft.Extensions.DependencyInjection
     /// <summary>
     /// Extension methods for adding configuration related options services to the DI container via <see cref="OptionsBuilder{TOptions}"/>.
     /// </summary>
+    [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2091:UnrecognizedReflectionPattern",
+        Justification = "Workaround for https://github.com/mono/linker/issues/1416. Outer method has been annotated with DynamicallyAccessedMembers.")]
     public static class OptionsBuilderExtensions
     {
         /// <summary>
@@ -28,23 +30,14 @@ public static class OptionsBuilderExtensions
 
             optionsBuilder.Services.AddHostedService<ValidationHostedService>();
             optionsBuilder.Services.AddOptions<ValidatorOptions>()
-                .Configure<IOptionsMonitor<TOptions>>((vo, options) => ValidateOnStartHelper(vo, options, optionsBuilder));
+                .Configure<IOptionsMonitor<TOptions>>((vo, options) =>
+                {
+                    // This adds an action that resolves the options value to force evaluation
+                    // We don't care about the result as duplicates are not important
+                    vo.Validators[typeof(TOptions)] = () => options.Get(optionsBuilder.Name);
+                });
 
             return optionsBuilder;
         }
-
-        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2091:UnrecognizedReflectionPattern",
-            Justification = "Workaround for https://github.com/mono/linker/issues/1416. Outer method has been annotated with DynamicallyAccessedMembers.")]
-        private static void ValidateOnStartHelper<TOptions>(ValidatorOptions vo, IOptionsMonitor<TOptions> options, OptionsBuilder<TOptions> optionsBuilder)
-            where TOptions : class
-        {
-            // This adds an action that resolves the options value to force evaluation
-            // We don't care about the result as duplicates are not important
-            vo.Validators[typeof(TOptions)] = () => GetOptionsMethod(options, optionsBuilder);
-        }
-
-        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2091:UnrecognizedReflectionPattern",
-            Justification = "Workaround for https://github.com/mono/linker/issues/1416. Outer method has been annotated with DynamicallyAccessedMembers.")]
-        private static void GetOptionsMethod<TOptions>(IOptionsMonitor<TOptions> options, OptionsBuilder<TOptions> optionsBuilder) where TOptions : class => options.Get(optionsBuilder.Name);
     }
 }