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[Source] .NET/C# parent-child processes communicate using MemoryMappedFile

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Posted on 2025-4-2 09:10:46 | | | |
Requirements: Start a process using the C# main console, the main process passes data to the child process, and the child process processes it, and then returns the data to the main process. Communicate with a MemoryMappedFile memory-mapped file.

Other ways

.NET/C# NamedPipe-based NamedPipe Cross-Process Communication [with Source Code]
https://www.itsvse.com/thread-10628-1-1.html

.NET/C# implements program singleton based on Mutex and MemoryMappedFile
https://www.itsvse.com/thread-10808-1-1.html

.NET/C# parent-child processes communicate using standard input/output streams
https://www.itsvse.com/thread-10982-1-1.html

Idea: The main process creates a MemoryMappedFile memory mapping file, which is divided into 2 blocks, the first is the input and the second is the output. It can also be understood as the first space to write to the main process to read to the subprocess, and the second space to write to the subprocess to read the main process.

The code is as follows:


The renderings are as follows:



Reference:

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