Removing numbers from text using C#

Question

I have a text file for processing, which has some numbers. I want JUST text in it, and nothing else. I managed to remove the punctuation marks, but how do I remove the numbers? I want this using C# code.

Also, I want to remove words with length greater than 10. How do I do that using Reg Expressions?

Answer 1

You can do this with a regex:

string withNumbers = // string with numbers
string withoutNumbers = Regex.Replace(withNumbers, "[0-9]", "");

Use this regex to remove words with more than 10 characters:

[\w]{10, 100}

100 defines the max length to match. I don't know if there is a quantifier for min length...

Answer 2

Only letters and nothing else (because I see you also want to remove the punctuation marks)

Regex.IsMatch(input, @"^[a-zA-Z]+$");