Difference between string and StringBuilder in C#

string and StringBuilder in C#

Both string and StringBuilder are used for manipulating the text. But they have different characteristics and are suitable for different scenarios.

1. Immutable:

When we create a string type variable it’s content can not be changed so due to this reason it called immutable Strings.

Any operation that seems to modify a string actually creates a new string object.

2. Memory Overhead:

Since strings are immutable, operations like concatenation can result in the creation of multiple string objects, leading to memory overhead.

3. Usage:

Suitable for scenarios where the content of the string doesn’t change frequently, such as representing constant values, storing configuration settings, etc.

string firstName = "James";
string lastName = "Doe";
string fullName = firstName + " " + lastName; // Creates a new string
Console.Write("After concatenation the string is : {0}", fullName);

Output:

After concatenation the string is : James Doe

1. Mutable: