can't add to framework 4.5

[kmohsenk]

hi.
I want to add this to my project but NuGet says:

Install-Package : Could not install package 'PersianDateTimePicker 1.0.1'. You are trying to install this package into a project
that targets '.NETFramework,Version=v4.5', but the package does not contain any assembly references or content files that are
compatible with that framework. For more information, contact the package author.
At line:1 char:1

• Install-Package PersianDateTimePicker -Version 1.0.1

•   + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
  

what do I must do?
thanks.