Reading attributes with reflection in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the type of the class using reflection.

C Sharp (C#)

Type type = typeof([1]);

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AAttribute

BMyClass

CGetType

DReflection

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetType() instead of typeof for a type.

Using attribute or reflection keywords incorrectly.

To get the type of a class, use typeof(ClassName).

2fill in blank

medium

Complete the code to get the custom attributes of the class.

C Sharp (C#)

object[] attrs = type.GetCustomAttributes([1], false);

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Anull

Bfalse

Ctrue

Dtypeof(MyAttribute)

Attempts:

3 left

💡 Hint

Common Mistakes

Passing true or false instead of a Type object.

Passing null which returns all attributes.

To get specific attributes, pass typeof(AttributeName) to GetCustomAttributes.

3fill in blank

hard

Fix the error in the code to check if the attribute exists on the class.

C Sharp (C#)

bool hasAttr = type.IsDefined([1], false);

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Atypeof(MyAttribute)

Btrue

CMyAttribute

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Passing true or false instead of a Type.

Passing the attribute class name without typeof.

IsDefined expects a Type object for the attribute, so use typeof(MyAttribute).

4fill in blank

hard

Fill both blanks to get the first custom attribute and cast it to the correct type.

C Sharp (C#)

MyAttribute attr = (MyAttribute)type.GetCustomAttributes([1], false)[[2]];

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Atypeof(MyAttribute)

B0

C1

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong index like 1 which may cause errors if only one attribute exists.

Passing false instead of typeof for the attribute type.

GetCustomAttributes returns an array; index 0 is the first attribute. Use typeof to specify attribute type.

5fill in blank

hard

Fill all three blanks to read a property value from the attribute instance.

C Sharp (C#)

var value = attr.[1]; // Access property
if (value [2] [3])
{
    Console.WriteLine("Property value is valid.");
}

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AName

B==

C"Test"

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using != instead of == causing logic errors.

Using wrong property name that does not exist.

Access the property by name, compare it with the expected string using ==.