using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<=<tabTrigger>[a-z])(?=\d<\/tabTrigger>)";
string substitution = @"_";
string input = @"<snippet>
<content><![CDATA[$1_$2
]]></content>
<tabTrigger>a1</tabTrigger>
<description></description>
<scope>text.tex.latex</scope>
</snippet>
<snippet>
<content><![CDATA[$1_$2
]]></content>
<tabTrigger>F1</tabTrigger>
<description></description>
<scope>text.tex.latex</scope>
</snippet>";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase;
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