Can you declare a private class in a namespace?

Because private means that the member is only access in the containing class. If you force to create a private class in Namespace, compiler will throw a compile time error "Namespace elements cannot be explicitly declared as private, protected or protected internal" .
A.

What is an internal class C#?

The internal keyword is an access modifier for types and type members. We can declare a class as internal or its member as internal. Internal members are accessible only within files in the same assembly (.dll). In other words, access is limited exclusively to classes defined within the current project assembly.
  • What is meant by sealed class in C#?

    Sealed classes are used to restrict the inheritance feature of object oriented programming. Once a class is defined as a sealed class, the class cannot be inherited. In C#, the sealed modifier is used to define a class as sealed. In Visual Basic .NET the NotInheritable keyword serves the purpose of sealed.
  • What are the access modifiers in C#?

    Access Modifiers (Access Specifiers) describes as the scope of accessibility of an Object and its members. All C# types and type members have an accessibility level . C# provide five access specifiers , they are as follows : public, private , protected , internal and protected internal .
  • Which access specifiers must be used for main method?

    Explanation: main() method must be specified public as it called by Java run time system, outside of the program. If no access specifier is used then by default member is public within its own package & cannot be accessed by Java run time system.
B.

What is the default access modifier for a class in C#?

The variable or classes that are declared with internal can be access by any member within application. It is the default access specifiers for a class in C# programming. Default access modifier of class is Internal and private for class member.
  • Is a class public by default in C#?

    Internal is the default if no access modifier is specified. The access level for class members and struct members, including nested classes and structs, is private by default.
  • What are the access modifiers in C#?

    C++ uses the three modifiers called public , protected , and private . C# has the modifiers public , protected , internal , private , and protected internal . Java has public , package , protected , and private . The access modifier package is the default and used, if any other access modifier keyword is missing.
  • What is internal class in C#?

    The internal access specifier hides its member variables and methods from other classes and objects, that is resides in other namespace. The variable or classes that are declared with internal can be access by any member within application. It is the default access specifiers for a class in C# programming.
C.

What is protected internal in C#?

The "protected internal" access modifier is a union of both the "protected" and "internal" modifiers. From MSDN, Access Modifiers (C# Programming Guide): protected: The type or member can be accessed only by code in the same class or struct, or in a class that is derived from that class.
  • What is the use of void in C#?

    A method that takes no parameters and returns no value is declared as follows: public void SampleMethod() { // Body of the method. } void is also used in an unsafe context to declare a pointer to an unknown type.
  • What is the use of constructor in C#?

    Constructors have the same name as the class or struct, and they usually initialize the data members of the new object. Unless the class is static, classes without constructors are given a public default constructor by the C# compiler in order to enable class instantiation.
  • What is the keyword virtual mean in the method definition?

    If a base class have a virtual method it means that method must be override by the derived class using override keyword.

Updated: 3rd December 2019

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