How to Efficiently Read a Text File in Reverse Using a C# Iterator?

Use the C#iterator to read the text file reverse

This article introduces how to use the C#iterator (Yield Return) to highly read text files to avoid loading the entire file to the memory.

Create flow source:

determine the method of creating a addressable stream or a specified file name.
1. Definition code: Specify the encoding of bytes into text.
2. Cushion size: The size of the buffer used to read data from flowing.
Character start detection:
3. Define a function to detect the starting position of the character in the code used. Reverselinereader class:
Create a class to package the function of the above parameters.
4. Implement:
5. Open the stream. Check readability and addressability.
6. reverse iteration flow, detect character boundaries and decode text. Store the end of the previous line and return in line in line.
   • Treatment of special circumstances such as UTF-16 and changes.
   • How to use:
   Create a new ReverselineReader and call its Getenumerator () method. This method returns an Ienumerator
   • , which iterates iteratively.
7. <:> Note:
   • This solution only supports single-byte encoding, UTF-8 and Unicode. For other long -term coding, custom processing may be required.

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