Using regex to manipulate string in C#

I currently have a regex method that removes a specific series of characters from an existing text file, although how could I d开发者_运维知识库o this with a string instead?

e.g. remove any occurrences of "xyz" from s string

The code I have so far:

var result = Regex.Replace(File.ReadAllText(@"Command.bat"), @"test", string.Empty);
System.IO.File.WriteAllText(@"Command.bat", result);

If you want to use string you can use the Replace function of the string.

var line = "bansskgngxyz".Replace("xyz","");

Uhh.. it already does it with a string. ReadAllText returns a string, and WriteAllText writes a string... so all you have to do is change the File.ReadAllText to a string and you're done.

In other words:

var result = Regex.Replace(@"test string", @"test", string.Empty);
System.IO.File.WriteAllText(@"Command.bat", result);

EDIT:

Your code above can be rewritten as:

string s = File.ReadAllText(@"Command.bat");
var result = Regex.Replace(s, @"test", string.Empty);
System.IO.File.WriteAllText(@"Command.bat", result);

So as you can see, Regex.Replace already accepts a string, does this make it any more clear?

string s = "xyz";
var newS = Regex.Replace(s, "test", "");