Use the "ControlChars.Quote" module, to use as a constant for the character control.
Quick Example..
Code:
Dim id As String
id = Application.StartupPath & "\" & "Resources\Arc.exe"
Dim Method1 As String
Method1 = String.Format("a -s; -ep1 -di -i2 -r -ed -w.\_tmp " + Method_Text.Text + " {0} {1}", _
ControlChars.Quote & Out_Path.Text.ToString & ControlChars.Quote & _
ControlChars.Quote & In_Path.Text.ToString & ControlChars.Quote)
At the end of compression when you execute the specified delegate for the removal of temporary files, also eliminates files "arc.exe" & "arc.ini" .