Inspecting methods and properties in C Sharp (C#) - Interactive Code Practice

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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AEquals

BToString

CGetType

DGetHashCode

Attempts:

3 left

💡 Hint

Common Mistakes

Using ToString() instead of GetType()

Trying to access a property instead of calling a method

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

2fill in blank

medium

Complete the code to get all public methods of a type.

C Sharp (C#)

MethodInfo[] methods = type.[1]();

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AGetProperties

BGetConstructors

CGetFields

DGetMethods

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetProperties() instead of GetMethods()

Using GetFields() which returns fields, not methods

The GetMethods() method returns an array of MethodInfo objects representing all the public methods of the type.

3fill in blank

hard

Fix the error in the code to get the name of the first property.

C Sharp (C#)

string propName = type.GetProperties()[[1]].Name;

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A-1

B0

Cnull

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 as index causing IndexOutOfRangeException

Using null which is invalid as an index

Array indexes start at 0, so to get the first property, use index 0.

4fill in blank

hard

Fill both blanks to get all public properties and filter those with a specific type.

C Sharp (C#)

PropertyInfo[] props = type.[1]();
var stringProps = props.Where(p => p.PropertyType == typeof([2]));

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AGetProperties

BGetMethods

Cstring

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetMethods() instead of GetProperties()

Using int instead of string for filtering

GetProperties() gets all properties, and filtering by typeof(string) selects properties of type string.

5fill in blank

hard

Fill all three blanks to get method names that have no parameters.

C Sharp (C#)

MethodInfo[] methods = type.[1]();
var noParamMethods = methods.Where(m => m.GetParameters().[2] == [3]);

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AGetMethods

BLength

C0

DCount

Attempts:

3 left

💡 Hint

Common Mistakes

Using Count instead of Length on the parameters collection

Using 1 instead of 0 to check for no parameters

GetMethods() gets all methods, GetParameters() returns parameters, and Length == 0 filters methods with no parameters.