<PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.5-preview1" />

MultipartStreamProvider

public abstract class MultipartStreamProvider
An MultipartStreamProvider implementation examines the headers provided by the MIME multipart parser as part of the MIME multipart extension methods (see HttpContentMultipartExtensions) and decides what kind of stream to return for the body part to be written to.
public Collection<HttpContent> Contents { get; }

Gets the collection of HttpContent instances where each instance represents a MIME body part.

protected MultipartStreamProvider()

Initializes a new instance of the MultipartStreamProvider class.

public virtual Task ExecutePostProcessingAsync()

Immediately upon reading the last MIME body part but before completing the read task, this method is called to enable the MultipartStreamProvider to do any post processing on the HttpContent instances that have been read. For example, it can be used to copy the data to another location, or perform some other kind of post processing on the data before completing the read operation.

public virtual Task ExecutePostProcessingAsync(CancellationToken cancellationToken)

Immediately upon reading the last MIME body part but before completing the read task, this method is called to enable the MultipartStreamProvider to do any post processing on the HttpContent instances that have been read. For example, it can be used to copy the data to another location, or perform some other kind of post processing on the data before completing the read operation.

public abstract Stream GetStream(HttpContent parent, HttpContentHeaders headers)

When a MIME multipart body part has been parsed this method is called to get a stream for where to write the body part to.