Remove redundant null check

Author: linkdotnet

CHANGELOG.md

@@ -6,6 +6,9 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 
 ## [Unreleased]
 
+### Changed
+-   Remove redundant null check when using `AppendJoin`
+
 ## [1.12.0] - 2023-01-09
 
 ### Added

src/LinkDotNet.StringBuilder/ValueStringBuilder.AppendJoin.cs

@@ -43,7 +43,7 @@ public void AppendJoin<T>(char separator, IEnumerable<T> values)
         => AppendJoinInternalChar(separator, values);
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private void AppendJoinInternalString<T2>(ReadOnlySpan<char> separator, IEnumerable<T2> values)
+    private void AppendJoinInternalString<T>(ReadOnlySpan<char> separator, IEnumerable<T> values)
     {
         ArgumentNullException.ThrowIfNull(values);
 
@@ -69,7 +69,7 @@ private void AppendJoinInternalString<T2>(ReadOnlySpan<char> separator, IEnumera
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private void AppendJoinInternalChar<T2>(char separator, IEnumerable<T2> values)
+    private void AppendJoinInternalChar<T>(char separator, IEnumerable<T> values)
     {
         ArgumentNullException.ThrowIfNull(values);
 
@@ -81,10 +81,7 @@ private void AppendJoinInternalChar<T2>(char separator, IEnumerable<T2> values)
         }
 
         var current = enumerator.Current;
-        if (current != null)
-        {
-            AppendInternal(current);
-        }
+        AppendInternal(current);
 
         while (enumerator.MoveNext())
         {