From 2abc5284540fbe7069ce24832843dbaae204dad3 Mon Sep 17 00:00:00 2001
From: Atif Aziz <code@raboof.com>
Date: Sun, 26 Feb 2023 23:11:55 +0100
Subject: [PATCH 1/2] Use compiler-generated delegate cache in "AssertCount"

---
 MoreLinq/AssertCount.cs | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/MoreLinq/AssertCount.cs b/MoreLinq/AssertCount.cs
index 0273bf060..6bdd4f234 100644
--- a/MoreLinq/AssertCount.cs
+++ b/MoreLinq/AssertCount.cs
@@ -24,7 +24,8 @@ static partial class MoreEnumerable
     {
 #if MORELINQ
 
-        static readonly Func<int, int, Exception> DefaultErrorSelector = OnAssertCountFailure;
+        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.";
 
         /// <summary>
         /// Asserts that a source sequence contains a given count of elements.
@@ -42,7 +43,7 @@ static partial class MoreEnumerable
         /// </remarks>
 
         public static IEnumerable<TSource> AssertCount<TSource>(this IEnumerable<TSource> source, int count) =>
-            AssertCountImpl(source, count, DefaultErrorSelector);
+            AssertCountImpl(source, count, static (cmp, count) => new SequenceException(FormatSequenceLengthErrorMessage(cmp, count)));
 
         /// <summary>
         /// Asserts that a source sequence contains a given count of elements.
@@ -71,12 +72,6 @@ public static IEnumerable<TSource> AssertCount<TSource>(this IEnumerable<TSource
             int count, Func<int, int, Exception> errorSelector) =>
             AssertCountImpl(source, count, errorSelector);
 
-        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.";
-
 #endif
 
         static IEnumerable<TSource> AssertCountImpl<TSource>(IEnumerable<TSource> source,

From 27e961f679604cbed58ae96fbff253c981a86b3a Mon Sep 17 00:00:00 2001
From: Atif Aziz <code@raboof.com>
Date: Mon, 27 Feb 2023 07:55:29 +0100
Subject: [PATCH 2/2] Refresh extensions wrappers

---
 MoreLinq/Extensions.g.cs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/MoreLinq/Extensions.g.cs b/MoreLinq/Extensions.g.cs
index a19f82c10..e543cbe72 100644
--- a/MoreLinq/Extensions.g.cs
+++ b/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>