StringBuilder in C#

StringBuilder is a mutable string class in C# that allows efficient string manipulation without creating unnecessary objects. It is used for frequent concatenation, appending, or modification of strings.

The syntax for declaring and initializing a StringBuilder object in C# is as follows:

StringBuilder sb = new StringBuilder();

Here are some common methods of StringBuilder in C#:

• Append(): Appends a string or character to the end of the StringBuilder.
• Insert(): Inserts a string or character at the specified position in the StringBuilder.
• Remove(): Removes a specified number of characters from the StringBuilder, starting at a specified position.
• Replace(): Replaces all occurrences of a specified substring with a new string.
• Clear(): Clears all characters from the StringBuilder.
• ToString(): Converts the StringBuilder object to a string.

Here is source code of the C# Program to Illustrate StringBuilder. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

/*
 * C# Program to Illustrate StringBuilder
 */
 
using System;
using System.Text;
class Program
{
    static void Main()
    {
        StringBuilder bd = new StringBuilder();
        bd.Append("1 ");
        bd.Append("2 ");
        bd.Append("3 ");
        for (int i = 0; i < 5; i++)
        {
            bd.Append("z ");
        }
        string result = bd.ToString();
        Console.WriteLine(result);
        Console.ReadLine();
    }
}

1. This C# program illustrates the use of StringBuilder.
2. The Append() method appends a copy of the specified string to the StringBuilder.
3. Using a for loop, the value of ‘z‘ is appended multiple times.
4. The ToString() method is used to convert the StringBuilder’s character buffer into a string reference.

 
1 2 3 z z z z z

• Improved Performance: Efficiently handles string manipulations, enhancing speed.
• Reduced Memory Usage: Avoids unnecessary string object creations, saving memory.
• In-Place Modifications: Modifies strings without creating new instances.
• Streamlined Code: Cleaner and readable code for string operations.
• Faster Concatenation: Speeds up concatenation compared to alternatives, improving efficiency.
• Mutable Strings: Allows modification after creation for dynamic content.
• Efficient Loops: Performs well in loops and with large data.
• Suitable for Large Text: Handles large text or logs effectively.

Sanfoundry Global Education & Learning Series – 1000 C# Programs.