cosmetic

Author: lbargaoanu

src/AutoMapper/Features.cs

@@ -14,6 +14,7 @@ public interface IRuntimeFeature
 }
 public class Features<TFeature>
 {
+    static List<TFeature>.Enumerator? Empty;
     private List<TFeature> _features;
     public int Count => _features?.Count ?? 0;
     /// <summary>
@@ -49,7 +50,7 @@ private int IndexOf(Type featureType)
         for (; index < Count && _features[index].GetType() != featureType; index++);
         return index;
     }
-    public List<TFeature>.Enumerator GetEnumerator() => _features.GetEnumerator();
+    public List<TFeature>.Enumerator GetEnumerator() => _features?.GetEnumerator() ?? (Empty ??= new List<TFeature>().GetEnumerator());
 }
 public static class FeatureExtensions
 {
@@ -65,21 +66,13 @@ public static IMappingExpression<TSource, TDestination> SetFeature<TSource, TDes
     }
     internal static void Configure(this Features<IGlobalFeature> features, MapperConfiguration mapperConfiguration)
     {
-        if (features.Count == 0)
-        {
-            return;
-        }
         foreach (var feature in features)
         {
             feature.Configure(mapperConfiguration);
         }
     }
     public static void ReverseTo(this Features<IMappingFeature> features, Features<IMappingFeature> reversedFeatures)
     {
-        if (features.Count == 0)
-        {
-            return;
-        }
         foreach (var feature in features)
         {
             var reverse = feature.Reverse();
@@ -91,21 +84,13 @@ public static void ReverseTo(this Features<IMappingFeature> features, Features<I
     }
     internal static void Configure(this Features<IMappingFeature> features, TypeMap typeMap)
     {
-        if (features.Count == 0)
-        {
-            return;
-        }
         foreach (var feature in features)
         {
             feature.Configure(typeMap);
         }
     }
     internal static void Seal(this Features<IRuntimeFeature> features, IGlobalConfiguration configuration)
     {
-        if (features.Count == 0)
-        {
-            return;
-        }
         foreach (var feature in features)
         {
             feature.Seal(configuration);

src/AutoMapper/Internal/ReflectionHelper.cs

@@ -88,7 +88,7 @@ public static MemberInfo FindProperty(LambdaExpression lambdaExpression)
         {
             switch (expressionToCheck)
             {
-                case MemberExpression { Member: var member, Expression: { NodeType: ExpressionType.Parameter or ExpressionType.Convert } }:
+                case MemberExpression { Member: var member, Expression.NodeType: ExpressionType.Parameter or ExpressionType.Convert }:
                     return member;
                 case UnaryExpression { Operand: var operand }:
                     expressionToCheck = operand;