Aspose.Email.Foss 26.7.0

Aspose.Email FOSS for .NET

Aspose.Email FOSS for .NET is a dependency-free C# library for working with:

• Compound File Binary (CFB) containers
• Outlook MSG files
• High-level mutable message objects
• EML parsing and serialization through an in-repository MIME implementation

The package is designed for deterministic binary and message processing without external runtime dependencies.

Main Namespaces

• Aspose.Email.Foss.Cfb
• Aspose.Email.Foss.Msg

Features

• Read and write CFB containers through CfbReader and CfbWriter
• Read and write MSG documents through MsgReader, MsgWriter, and MsgDocument
• Create, edit, save, and reload high-level messages through MapiMessage
• Load .eml into MapiMessage with MapiMessage.LoadFromEml
• Save MapiMessage back to .eml with MapiMessage.SaveToEml
• Work with recipients, regular attachments, and embedded message attachments

Install

dotnet add package Aspose.Email.Foss

Quick Start

Read a subject from an MSG file:

using System.IO;
using Aspose.Email.Foss.Msg;
using var stream = File.OpenRead("sample.msg");

var message = MapiMessage.FromStream(stream);
Console.WriteLine(message.Subject);

Create and save a message:

using System.IO;
using Aspose.Email.Foss.Msg;

var message = MapiMessage.Create("Hello", "Body");
message.SenderName = "Alice";
message.SenderEmailAddress = "alice@example.com";
message.AddRecipient("bob@example.com", "Bob");
using var attachmentStream = new MemoryStream("abc"u8.ToArray());
message.AddAttachment("note.txt", attachmentStream, "text/plain");
using var output = File.Create("hello.msg");
message.Save(output);

Bridge between EML and MSG:

using System.IO;
using Aspose.Email.Foss.Msg;
using var input = File.OpenRead("message.eml");

var message = MapiMessage.LoadFromEml(input);
using var msgOutput = File.Create("message.msg");
message.Save(msgOutput);
using var emlOutput = File.Create("roundtrip.eml");
message.SaveToEml(emlOutput);

Build And Test

dotnet build csharp/src/Aspose.Email.Foss/Aspose.Email.Foss.csproj -c Release
dotnet pack csharp/src/Aspose.Email.Foss/Aspose.Email.Foss.csproj -c Release

Examples

Examples are available under csharp/examples/:

• create_msg_and_eml.cs
• msg_reader.cs
• msg_summary.cs