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Access modifiers control who can use parts of your code. They help keep your code safe and organized.
public class MyClass { public int number; // accessible everywhere private int secret; // accessible only inside MyClass internal int shared; // accessible inside the same assembly }
public means anyone can access.
private means only the current class can access.
internal means only code in the same project or assembly can access.
public class Car { public string Make; // anyone can see private string Model; // only inside Car internal int Year; // inside same project }
public class BankAccount { private decimal balance; public void Deposit(decimal amount) { balance += amount; } public decimal GetBalance() { return balance; } }
This program shows how public, private, and internal control access to Person's data.
using System; public class Person { public string Name; // anyone can access private int age; // only inside Person internal string City; // inside same assembly public Person(string name, int age, string city) { Name = name; this.age = age; City = city; } public void ShowAge() { Console.WriteLine($"Age is {age}"); } } class Program { static void Main() { Person p = new Person("Alice", 30, "New York"); Console.WriteLine(p.Name); // works // Console.WriteLine(p.age); // error: age is private p.ShowAge(); // works, prints age Console.WriteLine(p.City); // works inside same assembly } }
Private members cannot be accessed outside their own class.
Internal members are accessible only within the same project or assembly.
Public members are accessible from anywhere.
Access modifiers control who can use your code parts.
Use public for open access, private for hiding inside a class, and internal for sharing inside a project.
Which access modifier allows a class member to be accessed from any other code in the same project or assembly?
internal modifier allows access within the same assembly or project but not outside it.private restricts access to the same class only, public allows access from anywhere, and protected allows access in derived classes.Which of the following is the correct way to declare a private integer field named count in a class?
?
private int count;. Others have incorrect order or missing type.Consider the following code snippet:
class MyClass {
private int secret = 42;
public int GetSecret() {
return secret;
}
}
MyClass obj = new MyClass();
Console.WriteLine(obj.secret);What will happen when this code runs?
secret is declared private, so it cannot be accessed outside MyClass.obj.secret outside the class, which is not allowed and causes a compile-time error.Given this code snippet, identify the error and fix it:
class Sample {
internal int value;
}
class Test {
void Show() {
Sample s = new Sample();
Console.WriteLine(s.value);
}
}Assuming these classes are in different projects, what is the problem?
internal allows access only within the same project or assembly.Sample and Test are in different projects, Test cannot access internal members of Sample.value to public allows access from other projects.You have a class library project with a class Helper that has a method Calculate() marked as internal. You want to allow another project in the same solution to use Calculate() without making it public. What is the best way to achieve this?
internal restricts access to the same assembly, so other projects cannot access it by default.