Removing hidden/special characters from strings dot net

There will be situation when we need to remove special or hidden characters from a string. Below code will help you to chive the same.

C#

string output = new string(input.Where(c => !char.IsControl(c)).ToArray());

or 

 
string output = new string(input.Where(c => char.IsLetter(c) || char.IsDigit(c)).ToArray());

//if which to take only letters and

//if which to take only letters and digits

VB

Dim cleanString As String = Regex.Replace(yourString, "[^A-Za-z0-9\-/]", "")