What is the difference between string and StringBuilder in .NET?

What is the difference between string and StringBuilder in .NET?

In .NET, both string and StringBuilder are used to store and manipulate textual data. However, there are some key differences between the two:

String:

• String is an immutable type, meaning that once a string object is created, it cannot be modified.
• Any operation that appears to modify a string object actually creates a new string object in memory.
• Strings are ideal for situations where the content remains constant throughout the program execution.

StringBuilder:

• StringBuilder is a mutable type, allowing for the modification of the content within the same object.
• When using StringBuilder, the content can be modified without creating a new object each time, making it more memory-efficient for concatenating or modifying strings.
• StringBuilder is recommended for scenarios where frequent modifications are needed, such as building large strings or dynamically updating text.

Overall, the choice between string and StringBuilder depends on the requirements of the specific task at hand, with StringBuilder typically being more efficient for scenarios involving frequent string modifications.