using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(UNION ALL\D*?historical;)";
string substitution = @"\/\*\1\*\/";
string input = @"@b =
SELECT *
FROM @e;
UNION ALL
SELECT *
FROM @c_historical;
@r =
SELECT *
FROM @f;
UNION ALL
SELECT *
FROM @y_historical;";
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