Hi Qasim,
Thanks for contacting Syncfusion support.
We suspect that the reported issue raised due to the NuGet online feed URL was not configured properly in your package manager window. We can see that all the packages were tried to download from the below link.
We request you to check whether the NuGet packages are related to the URL is configured or not.
To know more about ASP.NET Core 1.0 and its configuration please refer the below link
If you still face any difficulties in configuring our components in ASP.NET Core application. Please revert with more information to provide the solution at the earliest.
Regards,
Manikandan Manikandan