Added new operator .AsyncDisposeMany(), equivalent to .DisposeMany(), but with support for IAsyncDisposable.

Author: JakenVeina

src/Directory.Build.props

@@ -62,6 +62,9 @@
   <ItemGroup>	
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.7.112" PrivateAssets="all" />	
   </ItemGroup>
+  <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="9.0.5" />
+  </ItemGroup>
   <ItemGroup Condition="!$(IsTestProject) AND !$(IsBenchmarkProject)">
     <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.556" PrivateAssets="all" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.13.1" PrivateAssets="All" />

src/Directory.build.targets

@@ -15,26 +15,35 @@
     <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
   </PropertyGroup>
 
+  <PropertyGroup Condition="($(TargetFramework) == 'netstandard2.0') OR ($(TargetFramework) == 'netstandard2.1')">
+    <DefineConstants>$(DefineConstants);SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
+  </PropertyGroup>
+
   <PropertyGroup Condition="$(TargetFramework.StartsWith('netcoreapp'))">
-    <DefineConstants>$(DefineConstants);NETCOREAPP;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETCOREAPP;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="($(TargetFramework) == 'netcoreapp3.0') OR ($(TargetFramework) == 'netcoreapp3.1')">
+    <DefineConstants>$(DefineConstants);SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework.StartsWith('net5'))">
-    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework.StartsWith('net6'))">
-    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework.StartsWith('net7'))">
-    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework.StartsWith('net8'))">
-    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
+
   <PropertyGroup Condition="$(TargetFramework.StartsWith('net9'))">
-    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDARD;PORTABLE;P_LINQ;SUPPORTS_BINDINGLIST;SUPPORTS_ASYNC_DISPOSABLE</DefineConstants>
   </PropertyGroup>
 </Project>

src/DynamicData.Tests/API/ApiApprovalTests.DynamicDataTests.DotNet9_0.verified.txt

@@ -1137,6 +1137,9 @@ namespace DynamicData
         public static DynamicData.IObservableCache<TObject, TKey> AsObservableCache<TObject, TKey>(this System.IObservable<DynamicData.IChangeSet<TObject, TKey>> source, bool applyLocking = true)
             where TObject :  notnull
             where TKey :  notnull { }
+        public static System.IObservable<DynamicData.IChangeSet<TObject, TKey>> AsyncDisposeMany<TObject, TKey>(this System.IObservable<DynamicData.IChangeSet<TObject, TKey>> source, System.Action<System.IObservable<System.Reactive.Unit>> disposalsCompletedAccessor)
+            where TObject :  notnull
+            where TKey :  notnull { }
         public static System.IObservable<DynamicData.IChangeSet<TObject, TKey>> AutoRefresh<TObject, TKey>(this System.IObservable<DynamicData.IChangeSet<TObject, TKey>> source, System.TimeSpan? changeSetBuffer = default, System.TimeSpan? propertyChangeThrottle = default, System.Reactive.Concurrency.IScheduler? scheduler = null)
             where TObject : System.ComponentModel.INotifyPropertyChanged
             where TKey :  notnull { }