match variant name or configuration value

Author: zhiyuanliang-ms

examples/FeatureBasedInjectionPOC/AlgorithmOmega.cs

@@ -3,7 +3,7 @@
 namespace FeatureBasedInjectionPOC
 {
     [FeaturedServiceAlias("Omega")]
-    internal class AlgorithmOmega : IAlgorithm
+    class AlgorithmOmega : IAlgorithm
     {
         public string Name { get; set; }
 

src/Microsoft.FeatureManagement/FeaturedService.cs

@@ -54,9 +54,14 @@ private bool IsMatchingVariant(Type implementationType, Variant variant)
                 implementationName = implementationType.Name;
             }
 
-            string variantConfiguration = variant.Configuration?.Value ?? variant.Name;
+            string variantConfiguration = variant.Configuration?.Value;
 
-            return string.Equals(implementationName, variantConfiguration, StringComparison.OrdinalIgnoreCase);
+            if (variantConfiguration != null && string.Equals(implementationName, variantConfiguration, StringComparison.OrdinalIgnoreCase))
+            {
+                return true;
+            }
+
+            return string.Equals(implementationName, variant.Name, StringComparison.OrdinalIgnoreCase);
         }
     }
 }