Scaffold-DbContext "connectionstring" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Entities -DataAnnotations

var serviceCollection = new ServiceCollection();
serviceCollection.AddDataProtection();
var services = serviceCollection.BuildServiceProvider();
var protectionProvider = ActivatorUtilities.CreateInstance<ProtectionProvider>(services);
string result = protectionProvider.Encrypt(Str);

[Required]
public string Title { get; set; }