C# Remove a letter that trails a number from multiple instances in a string whether with Regex by another method

Question

I have a log giving me messages that look like this

Error Message: \" Expected: 660m But was: 600m\" Error Message: \" Expected: 358m But was: 325m\" Error M

Answer 1

You may use a capturing group with a replacement backreference in the replacement pattern:

example = Regex.Replace(example, @"([0-9])[a-zA-Z]\b", "$1");

Note the \b word boundary after the letter pattern, it is used to make sure the letter is at the end of the word.

See the regex demo. Result:

Pattern details

• ([0-9]) - Capturing group 1 (later referred to with $1) matching any one digit
• [a-zA-Z] - an ASCII letter
• \b - a trailing word boundary