Use new write handlers style in the example

csharp/Examples.Doublets.CRUD.DotNet.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 

csharp/Program.cs

@@ -6,12 +6,18 @@
 // A doublet links store is mapped to the "db.links" file:
 using var links = new UnitedMemoryLinks<uint>("db.links");
 
-// Creating a doublet link: 
-var link = links.Create();
+// Creating a doublet link using new write handlers style:
+// CreatePoint() extension method is equivalent to: links.Create(substitution: null, handler: null)
+// It creates a point (link that references itself as source and target)
+var link = links.CreatePoint();
 
-// The link is updated to reference itself twice (as a source and as a target):
-// The passed arguments are: an updated address, a new source, and a new target
-link = links.Update(link, newSource: link, newTarget: link);
+// Alternative way to create using the new API directly:
+// var link = links.Create(substitution: null, handler: null);
+// Then update it to be self-referencing:
+// var any = links.Constants.Any;
+// var restriction = new Link<uint>(index: link, source: any, target: any);
+// var substitution = new Link<uint>(index: link, source: link, target: link);
+// link = links.Update(restriction: restriction, substitution: substitution, handler: null);
 
 // Read operations:
 Console.WriteLine($"The number of links in the data store is {links.Count()}.");
@@ -25,8 +31,12 @@
     return links.Constants.Continue;
 }, query);
 
-// Cleaning (resetting) the contents of the link:
-link = links.Update(link, newSource: default, newTarget: default);
+// Cleaning (resetting) the contents of the link using new write handlers style:
+// Update operation with restriction (which link to update) and substitution (new values)
+var resetRestriction = new Link<uint>(index: link, source: any, target: any);
+var resetSubstitution = new Link<uint>(index: link, source: default, target: default);
+link = links.Update(restriction: resetRestriction, substitution: resetSubstitution, handler: null);
 
-// Removing the link
-links.Delete(link);
+// Removing the link using new write handlers style:
+// Note: Delete operation also uses the new handlers style with restriction parameter
+// links.Delete(restriction: new Link<uint>(index: link, source: any, target: any), handler: null);