How to insert values into VB.NET Dictionary on instantiation?

If using Visual Studio 2010 or later you should use the FROM keyword like this:

Dim days = New Dictionary(Of Integer, String) From {{0, "string"}, {1, "string2"}}

See: http://msdn.microsoft.com/en-us/library/dd293617(VS.100).aspx

If you need to use a prior version of Visual Studio and you need to do this frequently you could just inherit from the Dictionary class and implement it yourself.

It might look something like this:

Public Class InitializableDictionary
    Inherits Dictionary(Of Int32, String)

    Public Sub New(ByVal args() As KeyValuePair(Of Int32, String))
        MyBase.New()
        For Each kvp As KeyValuePair(Of Int32, String) In args
            Me.Add(kvp.Key, kvp.Value)
        Next
    End Sub

End Class

Leave a Comment