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Visual Basic .NET / OOP

Constructor New

Learn Constructor New in Visual Basic .NET through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.

10 min read • Intermediate

Constructor New is an atomic Visual Basic .NET topic inside OOP. This lesson focuses on how the Constructor New construct is written, what it changes, and when it is the right tool.

Trace the example line by line. Identify the exact syntax for Constructor New, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.

Topic-specific example

vbnet-04-02-constructor-new.vb
vbnet Try It Live 
Class User
    Public ReadOnly Name As String
    Public Sub New(name As String)
        Me.Name=name
    End Sub
End Class
Console.WriteLine(New User("Ada").Name)
Edge case / engineering note

For Constructor New, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Constructor New Mastery Check →
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