Sort CSV comparing only first element in each row

How do you sort comma separated values in a file by compa开发者_运维技巧ring only first element in each row?

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• Read the file line by line
• Split the lines at the commas
• Sort
• Write back to file

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Something like:

var result = File.ReadAllLines(pathToFile).OrderBy(line => line.Split(",")[0])

Just note that this assumes your input is always valid. You would have to add your own error checking (empty rows, empty files, etc)