Verbatim and raw string literals in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a verbatim string literal in C#?

A verbatim string literal starts with @ and allows the string to include backslashes and new lines exactly as typed, without needing escape sequences.

beginner

How do you write a multi-line string in C# using verbatim literals?

Use @ before the opening quote and write the string across multiple lines. For example:

@"Line 1
Line 2"

preserves the line breaks.

intermediate

What is a raw string literal in C# 11 and later?

A raw string literal uses triple quotes ("""), allowing multi-line strings with no escape sequences, preserving all characters exactly as typed.

intermediate

How do you include double quotes inside a verbatim string literal?

Double the double quotes inside the string. For example:

@"She said, ""Hello!"""

outputs: She said, "Hello!"

intermediate

What is the main difference between verbatim and raw string literals in C#?

Verbatim strings start with @ and require doubling quotes to escape them, while raw string literals use triple quotes and allow easier multi-line strings with embedded quotes without doubling.

Which symbol starts a verbatim string literal in C#?

A $

B #

C @

D """

Verbatim strings start with @ before the opening quote.

How do you write a raw string literal in C# 11?

A Use triple double quotes """

B Use @ before the string

C Use single quotes

D Use backticks `

Raw string literals use triple double quotes """ to start and end the string.

How do you include a double quote inside a verbatim string literal?

A Double the double quotes ""

B You cannot include double quotes

C Use single quotes '"'

D Escape with a backslash \"

Inside verbatim strings, double quotes are included by doubling them.

Which of these is true about raw string literals?

A They require escaping backslashes

B They start with @

C They cannot span multiple lines

D They preserve all characters exactly as typed

Raw string literals preserve all characters exactly as typed, including new lines and quotes.

What is the output of this verbatim string? @"C:\Users\Admin"

A C:UsersAdmin

B C:\Users\Admin

C C:/Users/Admin

D Error

Verbatim strings treat backslashes literally, so the output is C:\Users\Admin with single backslashes.

Explain how verbatim string literals work in C# and how they help with file paths.

Think about how Windows file paths use backslashes.

Describe the advantages of raw string literals introduced in C# 11 compared to verbatim strings.

Consider how raw strings simplify writing complex strings.

Practice

1. What is the main purpose of a verbatim string literal in C# (starting with @)?

easy

A. To write strings that ignore escape sequences and can span multiple lines easily.

B. To create strings that automatically convert to uppercase.

C. To define strings that are encrypted at compile time.

D. To declare strings that are immutable and cannot be changed.

Solution

1. Step 1: Understand verbatim string syntax

   Verbatim strings start with @ and allow writing strings with backslashes and new lines without escape sequences.

2. Step 2: Identify the purpose

   This makes writing file paths and multi-line text easier and more readable.

3. Final Answer:

   To write strings that ignore escape sequences and can span multiple lines easily. -> Option A

4. Quick Check:

   Verbatim strings ignore escapes = A [OK]

Hint: Verbatim strings start with @ and ignore escape sequences [OK]

Common Mistakes:

• Thinking verbatim strings convert text case
• Assuming verbatim strings encrypt content
• Confusing immutability with verbatim syntax

2. Which of the following is the correct syntax for a raw string literal in C# 11+?

easy

A. """This is a raw string"""

B. @"This is a raw string"

C. 'This is a raw string'

D. "This is a raw string"

Solution

1. Step 1: Recall raw string literal syntax

   Raw string literals in C# 11+ use triple double quotes to start and end the string.

2. Step 2: Compare options

   """This is a raw string""" uses triple double quotes correctly; @"This is a raw string" is verbatim string syntax, not raw string.

3. Final Answer:

   """This is a raw string""" -> Option A

4. Quick Check:

   Raw strings use triple quotes = D [OK]

Hint: Raw strings use triple quotes """ at start and end [OK]

Common Mistakes:

• Confusing verbatim strings (@) with raw strings (""")
• Using single quotes for strings
• Using normal double quotes for raw strings

3. What will be the output of this C# code?

string path = @"C:\Users\Admin";
string raw = """C:\Users\Admin""";
Console.WriteLine(path);
Console.WriteLine(raw);

medium

A. C:\\Users\\Admin
C:\\Users\\Admin

B. C:\Users\Admin
C:\Users\Admin

C. C:UsersAdmin
C:UsersAdmin

D. C:\UsersAdmin
C:\Users\Admin

Solution

1. Step 1: Understand verbatim string output

   The verbatim string @"C:\Users\Admin" outputs the path with single backslashes because escapes are ignored.

2. Step 2: Understand raw string output

   The raw string """C:\Users\Admin""" preserves the backslashes exactly as typed, so output is the same.

3. Final Answer:

   C:\Users\Admin C:\Users\Admin -> Option B

4. Quick Check:

   Both print path with single backslashes = B [OK]

Hint: Both verbatim and raw strings preserve backslashes as typed [OK]

Common Mistakes:

• Expecting double backslashes in output
• Confusing escape sequences in verbatim strings
• Thinking raw strings remove backslashes

4. Identify the error in this code snippet:

string text = @"This is a "quoted" word.";

medium

A. Raw string literals require triple quotes, not @.

B. Verbatim strings cannot contain double quotes.

C. No error, code is correct.

D. Missing escape for inner quotes inside verbatim string.

Solution

1. Step 1: Check verbatim string rules for quotes

   In verbatim strings, double quotes inside must be doubled to escape them ("" for one ").

2. Step 2: Identify the error

   The code uses single double quotes inside verbatim string, causing syntax error.

3. Final Answer:

   Missing escape for inner quotes inside verbatim string. -> Option D

4. Quick Check:

   Double quotes inside verbatim need doubling = C [OK]

Hint: Double inner quotes "" inside verbatim strings to escape [OK]

Common Mistakes:

• Using single double quotes inside verbatim strings
• Confusing verbatim and raw string syntax
• Assuming verbatim strings allow unescaped quotes

5. You want to store this multi-line JSON string exactly as shown, including indentation and quotes, in C# 11+. Which is the best way to do it?

{
  "name": "Alice",
  "age": 30
}

hard

A. Use a normal string with \n for new lines and escaped quotes.

B. Use a verbatim string with @ and escape all quotes with backslashes.

C. Use a raw string literal with triple quotes preserving all formatting.

D. Use string concatenation for each line.

Solution

1. Step 1: Understand formatting needs

   The JSON string has multiple lines, indentation, and quotes that must be preserved exactly.

2. Step 2: Choose best string literal

   Raw string literals with triple quotes preserve all formatting and quotes without escapes, making code clean and readable.

3. Final Answer:

   Use a raw string literal with triple quotes preserving all formatting. -> Option C

4. Quick Check:

   Raw strings preserve multi-line and quotes = A [OK]

Hint: Use raw strings for exact multi-line text with quotes [OK]

Common Mistakes:

• Escaping quotes manually in verbatim strings
• Using normal strings with many escapes
• Concatenating strings unnecessarily