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C# Insert: String Insertion

In C#, you can insert a string into another string using the Insert method of the System.String class. In this tutorial, we'll cover the basics of using the Insert method effectively.

Insert

The Insert method inserts a specified string at a specified index position in the current string. Its signature is:

public string Insert(int startIndex, string value)

startIndex: The zero-based index position where the specified string should be inserted.
value: The string to insert.

The method returns a new string with the specified string inserted at the specified index position.

Example:

string original = "The quick brown jumps over the lazy dog.";
string inserted = original.Insert(16, "fox "); // "The quick brown fox jumps over the lazy dog."

Note that strings in C# are immutable, which means that the Insert method does not modify the original string. Instead, it creates a new string with the desired content.

Using StringBuilder for multiple insertions

If you need to perform multiple insertions or modifications on a string, consider using the System.Text.StringBuilder class, as it provides better performance in such scenarios.

Example:

using System.Text;

string original = "The quick brown jumps over the lazy dog.";

StringBuilder sb = new StringBuilder(original);
sb.Insert(16, "fox "); // "The quick brown fox jumps over the lazy dog."
sb.Insert(0, "Sentence: "); // "Sentence: The quick brown fox jumps over the lazy dog."

string result = sb.ToString();

In this tutorial, we covered how to insert a string into another string using the Insert method in C#. Remember that strings are immutable, so the Insert method returns a new string with the specified content. If you need to perform multiple string insertions or modifications, consider using the StringBuilder class for better performance.

How to use Insert in C# strings

The Insert method in C# is used to insert substrings or characters at a specific position in a string.

string originalString = "C# programming";
string newString = originalString.Insert(2, "Sharp"); // Returns "C# Sharp programming"

Inserting substrings into a string in C#

Use Insert to add a substring at a specified index.

string sentence = "C# is fun!";
string modifiedSentence = sentence.Insert(5, "programming "); // Returns "C# programming is fun!"

C# Insert method for position-based insertion

Insert a substring at a specific position in the string.

string text = "C# programming";
string newText = text.Insert(2, "Sharp "); // Returns "C# Sharp programming"

Inserting characters at a specific index in C# string
Insert characters at a specified index using Insert.
```
string word = "programming";
string modifiedWord = word.Insert(5, "C# "); // Returns "prograC# mming"
```

Inserting multiple strings into a string in C#

Combine multiple Insert operations to insert various substrings.

string original = "C# programming";
string result = original.Insert(2, "Sharp ").Insert(13, " is ").Insert(16, "awesome!"); // Returns "C# Sharp programming is awesome!"

Inserting line breaks with Insert in C#

Insert line breaks into a string for better formatting.

string multilineText = "This is a multiline text";
multilineText = multilineText.Insert(10, Environment.NewLine); // Inserts a line break at index 10

Inserting formatted data into a string in C#

Use Insert to insert formatted data into a string.

string template = "Hello, [Name]!";
string name = "John";
string greeting = template.Insert(7, name); // Returns "Hello, John!"

Using StringBuilder Insert method in C#

The Insert method in StringBuilder provides a more efficient way to modify strings.

StringBuilder sb = new StringBuilder("C# programming");
sb.Insert(2, "Sharp ");
string result = sb.ToString(); // Returns "C# Sharp programming"

Inserting dynamic content into a string in C#

Dynamically insert content based on runtime conditions.

string original = "C# programming";
string dynamicContent = "Sharp ";
string result = original.Insert(2, dynamicContent); // Returns "C# Sharp programming"

Inserting data in the middle of a large string in C#

Efficiently insert data in the middle of a large string.

string largeText = "This is a large text...";
string insertion = "new ";
largeText = largeText.Insert(largeText.Length / 2, insertion); // Inserts "new " in the middle

Inserting special characters with Insert in C#

Insert special characters into a string.

string sentence = "C# programming";
sentence = sentence.Insert(2, "\t"); // Inserts a tab character at index 2

Handling boundary cases with Insert in C#

Handle boundary cases, ensuring that the index is within valid bounds.

string text = "C# programming";
int index = 15;
if (index >= 0 && index <= text.Length)
{
    text = text.Insert(index, " is fun!");
}