/// <summary>
/// Constructor.
/// </summary>
/// <param name="contractType">Required.</param>
/// <param name="sharedInstance">Required.</param>
/// <exception cref="ArgumentNullException"/>
/// <exception cref="ArgumentException">If the <c>sharedInstance</c> does
/// not extend the <c>contractType</c>.</exception>
public SharedInstanceExportDescriptorProvider(Type contractType, object sharedInstance)
{
ContractType = contractType ?? throw new ArgumentNullException(nameof(contractType));
SharedInstance = sharedInstance ?? new ArgumentNullException(nameof(sharedInstance));
if (!ContractType.IsInstanceOfType(SharedInstance))
{
throw new ArgumentException(
$"Shared instance '{SharedInstance.GetType().GetFriendlyFullName()}'"
+ $" does not extend service contract type '{ContractType.GetFriendlyFullName()}'.");
}
}