Array of method calls using thread - multithreading

Question

I am using Windows Form Application. In that, I have a class, which consists of 5 different methods. All of them are filling private members from various sources using thread.
For that I am using following code snippet to call a method
Dim threadForMethod1 As Threading.Thread
threadForMethod1 = New Threading.Thread(AddressOf Method1)
threadForMethod1.Start()
Now I want to add on / off switch for thread. By the way, If I off the switch all the methods should execute using main thread.
What is the best way to implement it.

Answer 1

You can use the following Class:
Imports System.Threading
Public Class ThreadHandler
Dim t1 As New Thread(AddressOf M1)
Dim t2 As New Thread(AddressOf M2)
Public Sub M1()
Thread.Sleep(3000)
MsgBox("M1")
End Sub
Public Sub M2()
Thread.Sleep(3000)
MsgBox("M2")
End Sub
Public Sub StartAll()
If t1.ThreadState <> ThreadState.Unstarted Then
t1 = New Thread(AddressOf M1)
End If
If t2.ThreadState <> ThreadState.Unstarted Then
t2 = New Thread(AddressOf M2)
End If
t1.Start()
t2.Start()
End Sub
Public Sub StopAll()
t1.Abort()
t2.Abort()
End Sub
End Class
To Use the above Class:
Private th As New ThreadHandler()
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
th.StartAll()
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
th.StopAll()
End Sub