Choose the correct way to apply a WebService attribute to a class in C# (considering named parameters for Name and Description).
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A[WebService(Name = 'CuriousTab', Description = 'CURIOUSTAB WebService')]\nclass AuthenticationService : WebService { /* ... / }
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B<WebService ( Name : 'CuriousTab', Description : 'CURIOUSTAB WebService' )>\nclass AuthenticationService : inherits WebService { / ... / }
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C<WebService ( Name = 'CuriousTab', Description = 'CURIOUSTAB WebService' )>\nclass AuthenticationService : extends WebService { / ... / }
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D[WebService ( Name := 'CuriousTab', Description := 'CURIOUSTAB WebService')]\nclass AuthenticationService : inherits WebService { / ... / }
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ENone of the above
Answer
Correct Answer: [WebService(Name = 'CuriousTab', Description = 'CURIOUSTAB WebService')]\nclass AuthenticationService : WebService { / ... / }
Explanation
Introduction / Context:Attributes in C# use square brackets and named arguments with the equals sign. This question contrasts correct C# syntax with VB-like syntax or invalid named argument tokens.
Given Data / Assumptions:
- We want to apply a WebService attribute to a class.
- We are writing C#, not VB.NET.
Concept / Approach:In C#, attributes are written as [AttributeName(arg1, NamedProperty = value, ...)] preceding the declaration. Inheritance is expressed with a colon (:) and the base type name. VB.NET uses angle brackets and different keywords (Inherits) and named argument syntax (:=).
Step-by-Step Solution:
Option A: Correct C# syntax — brackets, Name =, Description =, and class : WebService.Option B: VB-like angle brackets and “inherits” keyword; not C#.Option C: VB-like attribute brackets and “extends” (Java); not C#.Option D: Mixes C# brackets with VB named-argument token := and VB “inherits”; invalid.Verification / Alternative check:Paste Option A into a C# project with the appropriate using directives (System.Web.Services) and it compiles. Others will not compile in C#.
Why Other Options Are Wrong:They either use the wrong language syntax (VB.NET/Java) or invalid tokens for C# named arguments.
Common Pitfalls:Copying snippets between languages without adjusting syntax; confusing attribute positional parameters with named properties.
Final Answer:[WebService(Name = 'CuriousTab', Description = 'CURIOUSTAB WebService')]class AuthenticationService : WebService { / ... */ }