using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])";
string substitution = @"_";
string input = @"ThisJustShowsWhereUnderscoresWouldBeInserted
Call_lower_After_re_sub_ToConvertToSnakeCase
camel2_camel2_case
getHTTPResponseCode
HTTPResponseCodeXYZ
capitalG
ACRONYM
Regular
https://stackoverflow.com/questions/1175208";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx