Dependencies in own NuGet packages - a dependency is not included

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C#

.NET

Visual-Studio

DLL

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All under .NET 7.0

Given is a custom library isential.crypt.dll that contains no external dependencies. A NuGet package was created from it and stored in a local package source.

A second custom library named isential.MySqloverSsh.dll uses three NuGet packages:

* isential.crypt
* MySql.Data
* SSH.NET

From this, I create another NuGet package called isential.MySqloverSsh and also store it in the same local package source.

The isential.MySqloverSsh.csproj looks like this:

<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
   <TargetFramework>net7.0-windows8.0</TargetFramework>
   <ImplicitUsings>enable</ImplicitUsings>
   <Nullable>enable</Nullable>
   
   <!-- NuGet-Paket-Metadaten -->
   <PackageId>isential.MySqloverSsh</PackageId>
   <Authors>isential gmbh</Authors>
   <Description>Stellt eine MySql-Verbindung über einen SSH-Tunnel her und öffnet diese gleichzeitig.</Description>
   <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
   <PackageProjectUrl>https://isential.de</PackageProjectUrl>
   <RepositoryUrl>https://isential.de</RepositoryUrl>
   <RepositoryType>Privat</RepositoryType>
   <PackageTags>isential MySqloverSsh</PackageTags>
   <AssemblyName>isential.MySqloverSsh</AssemblyName>
   <RootNamespace>isential.MySqloverSsh</RootNamespace>
   <Title>isential.MySqloverSsh</Title>
   <Version>1.0.0</Version>
   <Company>isential gmbh</Company>
   <Product>isential.MySqloverSsh</Product>
   <Copyright>(C) isential gmbh - alle Rechte vorbehalten.</Copyright>
 </PropertyGroup>
 
 <ItemGroup>
   <PackageReference Include="isential.crypt" Version="1.0.0" />
   <PackageReference Include="MySql.Data" Version="8.1.0" />
   <PackageReference Include="SSH.NET" Version="2020.0.2" />
 </ItemGroup>
</Project>

The NuGet package is created without errors.

I include this NuGet package in the target project. This is a WPF project under .NET 7.0.

The NuGet package manager also shows me everything correctly:

Abhängigkeiten
    net7.0
        MySql.Data (>=8.1.0)
        SSH.NET (>= 2020.0.2)
        isential.crypt (>= 1.0.0)

As you can see, isential.crypt is also listed as a dependency. However, after including it in the solution under "Packages", I have the following picture:

Pakete
    isential MySqloverSsh (1.0.0)
        Kompilietzeitassemblys
        Inhaltsdateien
        Dokumente
        MySql Data (8 1 0)
        SSH NET (2020.0.2)

As you can see, isential.crypt (1.0.0) is missing.

I have tried to include the library isential.crypt.dll directly in isential.MySqloverSsh as a DLL or project reference and still it is not available in the target project. Sure I can include isential.crypt.dll in the target project manually, but I'd rather do it via isential.MySqloverSsh to not have to worry about dependencies - this is supposed to be done automatically via the package isential.MySqloverSsh.

Why does this happen and how can I solve this?

What I have tried:

I tried to include isential.crypt.dll directly as a DLL (as a project reference) in isential.MySqloverSsh. But even in this case, the DLL is missing in the target project when including isential.MySqloverSsh.