private static Action <object, object> GetOrAddCopier(Type key)
{
// Validate parameters.
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
// Lock on the copiers.
lock (CopyFieldCopiers)
{
// Try and get the value.
if (CopyFieldCopiers.TryGetValue(key, out var copier))
{
return(copier);
}
// Set the copier.
copier = CreateCopier(key);
// Add it.
CopyFieldCopiers.Add(key, copier);
// Return the copier.
return(copier);
}
}
public static T CopyFields <T>(T instance)
where T : class, new()
{
// Validate parameters.
if (instance == null)
{
throw new ArgumentNullException(nameof(instance));
}
// The type.
Type type = typeof(T);
// Add or create the copier.
Action <object, object> copier = CopyFieldCopiers.GetOrAdd(type, CreateCopier);
// Get the uninitialized object.
// TODO: Get FormatterServices which has GetSafeUninitializedObject, remove new() constraint.
var t = new T();
// Copy.
copier(instance, t);
// Return t.
return(t);
}
