Question

How to write a generic solution to accept and invoke any function and return different types in VB.NET

Answer 1

Imports System

Class Program
    '  Generic method that executes a function returning T
    Private Shared Function Control(Of T)(ByVal f As Func(Of T)) As T
        Return f()
    End Function

    Private Shared Function GetNumber() As Integer
        Return 100
    End Function

    Private Shared Function GetMessage() As String
        Return "abcd"
    End Function

	Public Shared Sub Main()
        Dim number As Integer = Control(AddressOf GetNumber)
        Console.WriteLine($"Number: {number}")
		
        Dim message As String = Control(AddressOf GetMessage)
		Console.WriteLine($"String: {message}")
    End Sub
End Class

 
 
' run:
'
' Number: 100
' String: abcd
'

 

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