Why reflection is needed in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the type of the object.

C Sharp (C#)

Type type = obj.[1]();

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AGetObjectType

BGetClass

CGetType

DTypeOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using TypeOf which is a keyword, not a method.

Using GetClass which does not exist in C#.

The GetType() method returns the runtime type of the current instance.

2fill in blank

medium

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

C Sharp (C#)

string className = obj.GetType().[1];

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ATypeName

BFullName

CClassName

DName

Attempts:

3 left

💡 Hint

Common Mistakes

Using FullName which returns namespace plus class name.

Using ClassName or TypeName which do not exist.

The Name property of the Type object returns the class name without namespace.

3fill in blank

hard

Fix the error in the code to get all public properties of a class.

C Sharp (C#)

PropertyInfo[] properties = obj.GetType().[1]();

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AGetProperties

BGetMembers

CGetFields

DGetAttributes

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetFields which returns fields, not properties.

Using GetMembers which returns all members, not just properties.

GetProperties() returns all public properties of the type, which is needed to inspect properties via reflection.

4fill in blank

hard

Fill both blanks to invoke a method named 'Print' with no parameters using reflection.

C Sharp (C#)

MethodInfo method = obj.GetType().[1]("Print");
method.[2](obj, null);

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AGetMethod

BInvoke

CCallMethod

DExecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using CallMethod or Execute which do not exist.

Passing parameters incorrectly to Invoke.

GetMethod("Print") gets the method info, and Invoke(obj, null) calls it on the object with no parameters.

5fill in blank

hard

Fill all three blanks to create an instance of a class named 'Person' using reflection.

C Sharp (C#)

Type type = Type.[1]("Person");
object obj = Activator.[2](type);
string name = (string)type.GetProperty("Name").[3](obj);

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AGetType

BCreateInstance

CGetValue

DFindType

Attempts:

3 left

💡 Hint

Common Mistakes

Using FindType which does not exist.

Using wrong method to create instance or get property value.

Type.GetType("Person") gets the type, Activator.CreateInstance(type) creates an object, and GetValue(obj) gets the property value.