Verbatim and raw string literals in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of verbatim string with escape sequences

What is the output of this C# code snippet?

C Sharp (C#)

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

A C:/Users/Admin/Documents

B C:\\Users\\Admin\\Documents

C C:\Users\Admin\Documents

D C:UsersAdminDocuments

💡 Hint

Remember that verbatim strings treat backslashes as normal characters.

The @ symbol before the string makes it verbatim, so backslashes are not escape characters but literal backslashes.

❓ Predict Output

intermediate

Output of raw string literal with multiple lines

What will this C# code print?

C Sharp (C#)

string json = """
{
  "name": "Alice",
  "age": 30
}
""";
Console.WriteLine(json);

A

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

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

C {\n \"name\": \"Alice\",\n \"age\": 30\n}

D

{
  name: Alice,
  age: 30
}

💡 Hint

Raw string literals preserve all whitespace and line breaks exactly.

Raw string literals keep the text exactly as typed, including new lines and quotes without needing escapes.

🔧 Debug

advanced

Identify the error in verbatim string usage

What error will this code produce?

C Sharp (C#)

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

A SyntaxError: Invalid string literal due to unescaped quotes inside verbatim string

B No error, prints: This is a "quoted" word.

C Compilation warning: Use double quotes to escape inside verbatim string

D RuntimeException: Unterminated string literal

💡 Hint

How do you include double quotes inside a verbatim string?

Inside verbatim strings, double quotes must be doubled to be included literally.

❓ Predict Output

advanced

Output of raw string literal with embedded quotes

What is the output of this C# code?

C Sharp (C#)

string poem = """""Roses are red,
"Violets" are blue.
""""";
Console.WriteLine(poem);

A

"""Roses are red,
"Violets" are blue.
"""

B

"Roses are red,
"Violets" are blue.
"

C

Roses are red,
Violets are blue.

D

Roses are red,
"Violets" are blue.

💡 Hint

Raw string literals can contain quotes without escaping if the delimiter count is sufficient.

The raw string literal uses 5 quotes as delimiter, so inner quotes are preserved as is without escapes or delimiters.

🧠 Conceptual

expert

Difference between verbatim and raw string literals

Which statement correctly describes the difference between verbatim (@) and raw (""""" or more quotes) string literals in C#?

A Raw strings require doubling backslashes, verbatim strings do not allow new lines inside.

B Verbatim strings allow escape sequences like \n, raw strings preserve all characters including new lines and quotes without escapes.

C Verbatim strings preserve new lines and quotes without escapes, raw strings require escaping quotes.

D Raw strings are only for single-line strings, verbatim strings are for multiline strings.

💡 Hint

Think about how each treats backslashes, new lines, and quotes.

Verbatim strings treat backslashes literally but still require doubling quotes. Raw strings preserve everything exactly, including new lines and quotes, without escapes.

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