C# add new text to string WITHOUT copy it previous value

Question

I have string that i need to combine with another string , for example

string string1 = "cars"; // the text is just for example 
string string2 = "white";
// then
string string1 = string1 + string2;
// or
string string1 += string2;

Alright , at first glance it doesn't have any problem right ? NOPE , it does have problem

when the string.length / the string contain A LOT OF CHARACTER , for example when it contain 100.000 word , it start to get laggy or freeze when i put it inside loop, because it need to copy 100.000 word plus word from the other string everytime it combines string1 with string2 .

Is the any alternative way to add new text to string that contain massive amount of word ?

take a look at [StringBuilder](https://learn.microsoft.com/en-us/dotnet/standard/base-types/stringbuilder) — Matt.G, Sep 20 '19 at 13:25
Yeah, concatination isn't the best option, StringBuilder would do well for you :) — Icepickle, Sep 20 '19 at 13:26
Where do you get this string from? Could it be read into a stream? — andyb952, Sep 20 '19 at 13:26
I have take a look at it and it's exactly what i wanted ! thanks everyone :) ! — Fajar Merah Diwangkara, Sep 20 '19 at 13:32

Felice Pollano · Accepted Answer · 2019-09-20T15:53:43.520

6

The correct way to accumulate strings in c# is using StringBuilder. Example:

StringBuilder sb = new StringBuilder();
sb.Append("...");
sb.Append("...");
....
var result = sb.ToString()

Your solution appear to lag, since every time you "modify" a string a brand new one is created instead, so the garbage collector get a little crazy...

edited Sep 20 '19 at 15:53

answered Sep 20 '19 at 13:26

Felice Pollano

32,832
9
75
115

C# add new text to string WITHOUT copy it previous value

1 Answers1