[Solved] What will this C# program print?class A { public virtual string Msg() => "A"; } class B : A { public override string Msg() => "B"; } class C : B { public new string Msg() => "C";... | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

What will this C# program print?

class A { public virtual string Msg() => "A"; } class B : A { public override string Msg() => "B"; } class C : B { public new string Msg() => "C"; } class Program { static void Main() { A obj = new C(); Console.WriteLine(obj.Msg()); } }

AB

BCompilation error

CC

DA

Step-by-Step Solution

Solution:

Step 1: Analyze method declarations
Class C defines Msg() with 'new', hiding B's override. Variable obj is type A, holding C instance.
Step 2: Determine method called at runtime
Since Msg() is virtual in A and overridden in B, but C's method hides instead of overrides, the override in B is called.
Final Answer:
B -> Option A
Quick Check:
New keyword hides, override wins in polymorphism [OK]

Quick Trick: 'new' hides method, doesn't override virtual method [OK]

Common Mistakes:

MISTAKES

Thinking 'new' overrides virtual methods
Expecting C's Msg() to run via base type
Confusing method hiding with overriding

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What will this C# program print?

Step 1: Analyze method declarations

Step 2: Determine method called at runtime

Final Answer:

Quick Check:

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