MultipartFormDataContent

MultipartFormDataContent is a class in the .NET Framework, specifically within the System.Net.Http namespace, used for creating HTTP request content that adheres to the multipart/form-data MIME type. This content type is commonly employed for sending data that includes files and text fields in a single HTTP POST request.

When constructing an HTTP request to upload files or submit forms with complex data, MultipartFormDataContent simplifies the process. It allows developers to add various parts to the request body, each with its own content type and headers. Each part can represent a form field, a file, or any other data segment.

Key features of MultipartFormDataContent include the ability to add string content, byte arrays, and stream content as individual parts. For each part, you can specify a name, which corresponds to the form field name, and optionally a filename if the part represents a file. This enables accurate parsing of the request data on the server side.

Using MultipartFormDataContent is beneficial for scenarios like uploading images, documents, or any data where a structured, multi-part format is required. It abstracts away the complexities of manually constructing the multipart/form-data boundaries and encoding, making it easier to build robust web clients and services. The class is part of the HttpClient API, facilitating its integration into modern .NET HTTP communication patterns.