diff --git a/csharp/Lib/Utils/AsyncEnumerableEx.cs b/csharp/Lib/Utils/AsyncEnumerableEx.cs
index ffd069bdf..5bfc21015 100644
--- a/csharp/Lib/Utils/AsyncEnumerableEx.cs
+++ b/csharp/Lib/Utils/AsyncEnumerableEx.cs
@@ -5,6 +5,12 @@ namespace InnovEnergy.Lib.Utils;
 public static class AsyncEnumerableEx
 {
 
+    public static IAsyncEnumerable<R> SelectMany<T, R>(this IAsyncEnumerable<T> ts, Func<T, IEnumerable<R>> map)
+    {
+        return ts.SelectMany<T, R>(t => map(t).ToAsyncEnumerable());
+    }
+
+
     public static async IAsyncEnumerable<T> Throttle<T>(this IAsyncEnumerable<T> ts,
         TimeSpan dueTime,
         [EnumeratorCancellation] CancellationToken cancel = default)
diff --git a/csharp/Lib/Utils/Utils.csproj b/csharp/Lib/Utils/Utils.csproj
index 94dac3941..88d6cc0cc 100644
--- a/csharp/Lib/Utils/Utils.csproj
+++ b/csharp/Lib/Utils/Utils.csproj
@@ -1,8 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk">
-    <PropertyGroup>
-      <Configurations>Debug;Release;Release-Server</Configurations>
-      <Platforms>AnyCPU;linux-arm</Platforms>
-    </PropertyGroup>
     <Import Project="../InnovEnergy.Lib.props" />
 
     <PropertyGroup>
@@ -12,6 +8,7 @@
     <ItemGroup>
       <PackageReference Include="CliWrap" Version="3.6.0" />
       <PackageReference Include="DecimalMath.DecimalEx" Version="1.0.2" />
+      <PackageReference Include="System.Linq.Async" Version="6.0.1" />
       <PackageReference Include="System.Reactive.Linq" Version="5.0.0" />
     </ItemGroup>