Use compiler-generated delegate cache in "AssertCount"

Author: atifaziz

MoreLinq/AssertCount.cs

@@ -22,8 +22,6 @@ namespace MoreLinq
 
     static partial class MoreEnumerable
     {
-        static readonly Func<int, int, Exception> DefaultErrorSelector = OnAssertCountFailure;
-
         /// <summary>
         /// Asserts that a source sequence contains a given count of elements.
         /// </summary>
@@ -40,7 +38,7 @@ static partial class MoreEnumerable
         /// </remarks>
 
         public static IEnumerable<TSource> AssertCount<TSource>(this IEnumerable<TSource> source, int count) =>
-            AssertCount(source, count, DefaultErrorSelector);
+            AssertCount(source, count, static (cmp, count) => new SequenceException(FormatSequenceLengthErrorMessage(cmp, count)));
 
         /// <summary>
         /// Asserts that a source sequence contains a given count of elements.
@@ -93,9 +91,6 @@ public static IEnumerable<TSource> AssertCount<TSource>(this IEnumerable<TSource
             }
         }
 
-        static Exception OnAssertCountFailure(int cmp, int count) =>
-            new SequenceException(FormatSequenceLengthErrorMessage(cmp, count));
-
         internal static string FormatSequenceLengthErrorMessage(int cmp, int count) =>
             $"Sequence contains too {(cmp < 0 ? "few" : "many")} elements when exactly {count:N0} {(count == 1 ? "was" : "were")} expected.";
     }

MoreLinq/Extensions.g.cs

@@ -498,7 +498,6 @@ public static IEnumerable<TSource> Assert<TSource>(this IEnumerable<TSource> sou
     [GeneratedCode("MoreLinq.ExtensionsGenerator", "1.0.0.0")]
     public static partial class AssertCountExtension
     {
-
         /// <summary>
         /// Asserts that a source sequence contains a given count of elements.
         /// </summary>