regexes.md

This is a list of regular expressions which help to find LINQ mistakes (#3).

.Single() and .SingleOrDefault()

use: \.Single(OrDefault)?\(.*\)

.First() and .FirstOrDefault()

use: \.First(OrDefault)?\(.*\)

Empty .Count()

use: \.Count\(\)

Other occurences of .Count()

use: \.Count\(.*\) or in this case if.*\(.*\.Count\(.*\)\) might help.

.Where().First() and .Where().FirstOrDefault()

use: \.Where\(.*\)\.First(OrDefault)?\(.*\)

.Where().Where()

use: \.Where\(.*\)\.Where\(.*\)

.OrderBy().OrderBy()

use: \.OrderBy\(.*\)\.OrderBy\(.*\)

.Select(x => x)

use: \.Select\((\w)\s*=>\s*\1\)