[Bug]: **Many** Items cannot be Dragged and dropped onto a Form in Designer

Describe the bug Whilst testing #91 reproduction steps in Standard-Toolkit-Demo’s I found that many of the toolkit items cannot simple be dragged and dropped onto a from.

Also of those items that have successfully been draged, then they cannot be deleted ! (This may be due to cascade error form the initial designer failures)

To Reproduce

Expected behaviour Be able to use designer for *ALL Krypton elements

Desktop (please complete the following information):

• OS: [e.g. Windows 10]

<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
  <PropertyGroup>
    <TargetFrameworks>net48;net5.0-windows</TargetFrameworks>
    <OutputType>WinExe</OutputType>
    <RootNamespace>Test_Clip_Base</RootNamespace>
    <AssemblyName>Test Clip Base</AssemblyName>
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
    <UseWindowsForms>true</UseWindowsForms>
    <PlatformTarget>AnyCPU</PlatformTarget>
  </PropertyGroup>

Additional context <ProjectReference Include="..\..\..\..\Standard-Toolkit\Source\Krypton Components\Krypton.Toolkit\Krypton.Toolkit 2019.csproj" />

[Smurf-IV]

Yay… Found the workaround… But it has to go into the Forms project…

• Close any designer forms you may have open
• Place the following into the csproj file:

    <ItemGroup>
        <Reference Include="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition="$(TargetFramework.StartsWith('net4'))">
            <SpecificVersion>True</SpecificVersion>
            <Version>4.0.0.0</Version>
            <TreatAsUsed>False</TreatAsUsed>
        </Reference>
        <Reference Include="System.Design, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition="$(TargetFramework.StartsWith('net5'))">
            <SpecificVersion>True</SpecificVersion>
            <Version>5.0.0.0</Version>
            <TreatAsUsed>False</TreatAsUsed>
        </Reference>
        <Reference Include="System.Design, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition="$(TargetFramework.StartsWith('net6'))">
            <SpecificVersion>True</SpecificVersion>
            <Version>6.0.0.0</Version>
            <TreatAsUsed>False</TreatAsUsed>
        </Reference>
        <Reference Include="System.Design" Condition="'$(TargetFramework)' == 'net35'" />
        <!--TODO: Need to specify version here-->
    </ItemGroup>

• Rebuild.
  • You then MUST close Visual Studio and reopen / reload the solution
• Open the Form and you will have the designers available to use 😃

[Smurf-IV]

The following needs to go into a FAQ - As it is a Feature of Visual Studio (16.9.x anyway!)

With the fixes I have done…

It is possible to load all of the Toolkits into a Target application that has a *Single Target framework.

IF the project is MultiTarget: Then it is NOT possible to use some of the Toolkit designer elements !

At least when Linking directly from the source of the Toolkit to the Project (Same will probably apply via NuGet as the Designer will not know which to use first !)