using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(h[1-6]|p|a|img):\n[\w\-\.\d].*(?=\n{0,}?)";
string substitution = @"";
string input = @"h3:
Lorem, ipsum dolor, sit amet consectetur adipisicing elit. Voluptate, perspiciatis.
h4:
Lorem, ipsum dolor, sit amet consectetur adipisicing elit. Voluptate, perspiciatis.
p:
Hello this is a paragraph you can add something to our dsle deglet for more and now how to use this for free
img:
http://www.icon.in/logoe/gksoedfkle/dfkeadka/img.jpg
a:
rahul
p:
are you ready for more thing so what do you think
";
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