Migrate solution to .slnx, update type checks and rename file

Author: pwelter34

EntityChange.sln

@@ -0,0 +1,10 @@
+<Solution>
+  <Folder Name="/Build/">
+    <File Path=".github/dependabot.yml" />
+    <File Path=".github/workflows/dotnet.yml" />
+    <File Path="README.md" />
+    <File Path="src/Directory.Build.props" />
+  </Folder>
+  <Project Path="src/EntityChange/EntityChange.csproj" />
+  <Project Path="test/EntityChange.Tests/EntityChange.Tests.csproj" />
+</Solution>

EntityChange.slnx

@@ -71,7 +71,7 @@ public MemberMappingBuilder<TEntity, TProperty> Formatter(Func<TProperty?, strin
         if (formatterFactory == null)
             MemberMapping.Formatter = null;
         else
-            MemberMapping.Formatter = v => formatterFactory(v is not null ? (TProperty)v : default);
+            MemberMapping.Formatter = v => formatterFactory(v is TProperty property ? property : default);
 
         return this;
     }

…ityChange/ChangeJsonSerializerContext.cs …yChange/EntityChangeSerializerContext.cssrc/EntityChange/ChangeJsonSerializerContext.cs renamed to src/EntityChange/EntityChangeSerializerContext.cs src/EntityChange/ChangeJsonSerializerContext.cs renamed to src/EntityChange/EntityChangeSerializerContext.cs

@@ -70,8 +70,11 @@ public string CurrentName()
 
         // add indexers till property is reached
         var paths = new List<PathValue>();
-        foreach (var path in _pathStack)
+        var pathList = _pathStack.ToList();
+
+        for (int i = 0; i < pathList.Count; i++)
         {
+            var path = pathList[i];
             paths.Add(path);
             if (path.Indexer != true)
                 break;