How to replace more than a space in a string with some special character in c#

Question

How to replace more than a space in a string with some special character in c#? I have a string as ``` Hi I am new here. Would you please help me? ``` I want output as ``` Hi I$am new$here. Would$you$please help$me? ``` I tried ``` string line=@"Hi I am new here. Would you please help me?"; string line1 = Regex.Replace(line,@"[\s\s]+","$"); Console.WriteLine(line1); ``` but I am getting output as ``` Hi$I$am$new$here.$Would$you$please$help$me? ``` Could you please tell me where am I going wrong?

Accepted Answer

You should specify than you want more than two (`{2,}`) whitespace characters (`\s`):

```
string line1 = Regex.Replace(line,@"\s{2,}","$");
```

or only more than two spaces (`[ ]`):

```
string line1 = Regex.Replace(line,@"[ ]{2,}","$");
```

Note: `[\s\s]+` means: one or more of character group specified in `[]`, so as `\s` is doubled, it simply means: one or more of whitespace character.

How to replace more than a space in a string with some special character in c#

Solution

Problem