>>Don't know - unless it's a threading issue. But it seems to me your method is overly complicated - you could just use NumberFormatInfo directly without needing a Culture info:

Public Shared Function GetFormatValue(tnValue As Double, tcSeperator As String, tnDecimal As Integer) As String
>>	Return tnValue.ToString("N", New NumberFormatInfo() With { _
>>		Key .NumberDecimalSeparator = ".", _
>>		Key .NumberGroupSeparator = tcSeperator, _
>>		Key .NumberDecimalDigits = tnDecimal _
>>	})
>>End Function

>
>This will not be the same thing.
>
>Based on the language used of the member's account, we need to set up the culture accordingly so the display, for some settings, will be shown properly. If I just use this, I will not have the 100% exact same representation.

What properties of CultureInfo (other than NumberFormatInfo) affect the returned value ?