minor

csharp/Lib/Utils/AsyncEnumerableEx.cs

@@ -73,7 +73,13 @@ public static class AsyncEnumerableEx
         }
     }
 
-#pragma warning disable 1998
+    public static async void ForEach<T>(this IAsyncEnumerable<T> ts, Action<T> action)
+    {
+        await foreach (var t in ts)
+            action(t);
+    }
+
+    #pragma warning disable 1998
     public static async IAsyncEnumerable<T> Repeat<T>(this T t, [EnumeratorCancellation] CancellationToken ct = default)
     {
         while(!ct.IsCancellationRequested)

csharp/Lib/Utils/GraphTraversal.cs

@@ -59,13 +59,14 @@ public static class GraphTraversal
     }
 
     [SuppressMessage("ReSharper", "PossibleMultipleEnumeration")]
-    private static IEnumerable<T> Traverse<T>(IEnumerable<T> sources, 
+    private static IEnumerable<T> Traverse<T>(
+        IEnumerable<T> sources, 
         Func<T , Func<T, IEnumerable<T>>,IEnumerable<T>> traversor,
         Func<T, IEnumerable<T>> getChildren,
         IEqualityComparer<T>? comparer = null)
     {
         var set = new HashSet<T>(sources, comparer ?? EqualityComparer<T>.Default);
-        IEnumerable<T> GetUniqueChildren(T n) => getChildren(n).Where(set.Add);
+        IEnumerable<T> GetUniqueChildren(T n) => getChildren(n).Where(set!.Add);
 
         return from s in sources
                from e in traversor(s, GetUniqueChildren)

csharp/Lib/Utils/Utils.cs

@@ -1,5 +1,5 @@
+using System.Collections.Concurrent;
 using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Runtime.CompilerServices;
 using static System.Runtime.CompilerServices.MethodImplOptions;
@@ -171,4 +171,12 @@ public static class Utils
     }
 
     public static String ExecutingProcessName => Process.GetCurrentProcess().ProcessName;
+    
+    
+    public static Func<A, R> Memoize<A, R>(Func<A, R> func) where A : notnull
+    {
+        var cache = new ConcurrentDictionary<A, R>();
+        
+        return arg => cache.GetOrAdd(arg, func);
+    }
 }

csharp/Lib/Victron/VeDBus/VeProperties.Dbus.cs

@@ -109,8 +109,8 @@ public static class VePropertiesDbus
                     VeDBusApi.GetValue => msg.Ok(p.Value),
                     VeDBusApi.GetText  => msg.Ok(p.Text),
                     VeDBusApi.GetItems => msg.Ok(p.GetItem()),
-                    VeDBusApi.SetValue => (p.Writeable && msg.ObjectPath != null)
-                        ? msg.Ok((p.Value==msg.Payload! || props.Set(path: msg.ObjectPath.Value, value: msg.Payload!, writable: true)) ? 0 : -1)
+                    VeDBusApi.SetValue => p.Writeable && msg.ObjectPath != null
+                                        ? msg.Ok(p.Value==msg.Payload! || props.Set(path: msg.ObjectPath.Value, value: msg.Payload!, writable: true) ? 0 : -1)
                                         : msg.ObjectNotWritable(msg.Member),
                     _ => msg.UnknownMember(msg.Member)
                 };
@@ -150,7 +150,6 @@ public static class VePropertiesDbus
         return CreateErrorReply(msg, $"Not Writable Property: {objectPath}");
     }
 
-
     private static Message CreateErrorReply(Message msg, String error)
     {
         Debug.WriteLine("ERROR: " + error);