i try but
I get this error
PM> Install-Package Microsoft.NETCore -Version 5.0.0
Attempting to gather dependency information for package 'Microsoft.NETCore.5.0.0' with respect to project 'StokPro', targeting '.NETFramework,Version=v4.5.2'
Attempting to resolve dependencies for package 'Microsoft.NETCore.5.0.0' with DependencyBehavior 'Lowest'
Resolving actions to install package 'Microsoft.NETCore.5.0.0'
Resolved actions to install package 'Microsoft.NETCore.5.0.0'
Adding package 'Microsoft.CSharp.4.0.0' to folder 'C:\Users\aras adar\Desktop\Stokkk\StokPro\packages'
Added package 'Microsoft.CSharp.4.0.0' to folder 'C:\Users\aras adar\Desktop\Stokkk\StokPro\packages'
Added package 'Microsoft.CSharp.4.0.0' to 'packages.config'
Successfully installed 'Microsoft.CSharp 4.0.0' to StokPro
Install failed. Rolling back...
Package 'Microsoft.NETCore.Platforms.1.0.0' does not exist in project 'StokPro'
Removed package 'Microsoft.CSharp.4.0.0' from 'packages.config'
Package 'Microsoft.NETCore.Platforms.1.0.0' does not exist in folder 'C:\Users\aras adar\Desktop\Stokkk\StokPro\packages'
Removing package 'Microsoft.CSharp.4.0.0' from folder 'C:\Users\aras adar\Desktop\Stokkk\StokPro\packages'
Removed package 'Microsoft.CSharp.4.0.0' from folder 'C:\Users\aras adar\Desktop\Stokkk\StokPro\packages'
Install-Package : Could not install package 'Microsoft.NETCore.Platforms 1.0.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.5.2', but the package does not conta
in any assembly references or content files that are compatible with that framework. For more information, contact the package author.
At line:1 char:2
+ Install-Package Microsoft.NETCore -Version 5.0.0
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Install-Package], Exception
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand