C# remove substring

string hello = "Hello Word";
string result = hello.Replace("lo Wo","");

//The following example removes all characters from a string that are after 25th position in the string.

string founder = "Mahesh Chand is a founder of C# Corner";  
// Remove all characters after first 25 chars  
string first25 = founder.Remove(25);  
Console.WriteLine(first25);  
//************************************   ^_*
//The following example removes 12 characters from the 10th position in the string.

// Remove characters start at the 10th position, next 12 characters  
String newStr = founder.Remove(10, 12);  
Console.WriteLine(newStr);  

int begin = myString.IndexOf('(');
int end = myString.IndexOf('"');
string altered = myString.Remove(begin + 1, end - begin - 1);