PreconditionFailedException Class

[SerializableAttribute]
public sealed class PreconditionFailedException : WebDavHttpException

<SerializableAttribute>
Public NotInheritable Class PreconditionFailedException
	Inherits WebDavHttpException

[SerializableAttribute]
public ref class PreconditionFailedException sealed : public WebDavHttpException

[<SealedAttribute>]
[<SerializableAttribute>]
type PreconditionFailedException =  
    class
        inherit WebDavHttpException
    end

IFolder itemSrc = await session.GetFolderAsync(new Uri("https://server:8080/Library/"));
IFolder itemDst = await session.GetFolderAsync(new Uri("https://server:8080/Sales/"));
try
{
    await itemSrc.MoveToAsync(itemDst, itemSrc.DisplayName, false);
}
catch (PreconditionFailedException)
{
    Console.WriteLine("The destination item exists and 'overwrite' was 'false'.");
}
catch (WebDavHttpException ex)
{
    Console.WriteLine(ex.Message + " " + ex.Status.Code + " " + ex.Status.Description);
    foreach (IMultistatusResponse resp in ex.Multistatus.Responses)
    { // Find which items failed to move.
        Console.WriteLine(resp.Href + " " + resp.Status.Code + " " + resp.Status.Description);
    }
}