I am using Regex replace as below :
string test = "[abc] Sends the employee mail. [twist] Sends the employee mail.";
test = Regex.Replace(test, "[twist]", "hello");
And the result is coming as :
test = "[abc] Sendhello hellohe employee mahellol. [hellohellohellohellohello] Sendhello hellohe employee mahellol."
Where as it should just replace [twist] string with hello.
What is going wrong here.
You must escape the brackets (at least the opening one). Change
"[twist]"
to
"\\[twist\\]"
or, using a verbatim literal to avoid the double \,
@"\[twist\]"
[twist] is interpreted as any of the t, w, i, s or t character and any of them is replaced by the hello string.
@"\[twist\]" :-)Regex.Replace(test,"\[twist\]","hello")
As additional useful informations, you could escape the [ as [[], so
"[[]twist]"
or you could
"\\x5btwist]"
where \x5b is the ascii code of [. Note that you need to escape the \ of \x5b because otherwise "\x5b" == "[" (the C# makes the string replacement). By escaping it instead it's the Regex that "receives" the \x5b and considers it as a [. Clearly you could disable escape sequences expansion by using the @
@"\x5btwist]"