How do I open / run Cognos Impromptu Report from CSharp

Hi,

I am new to Csharp and using C# for my application development and I need to load Cognos Impromptu application and run a report from my application automatically and run the report to create ascii text file. Is there any code is available? I have vb.net code but I do not know how to write it is in C#. If you have please send me, your help is really appreciated.

for your reference I am sending vb.net code, I need the below code in CSharp.

Call Cognos("C::AccountsPayable DOWNLOAD.IMR", "c:\APDownload.txt")

Function

Private Sub Cognos(ByRef StrReport As String, ByRef StrText As String)

        Dim objImpApp As New Object
        Dim objImpRep As New Object
        objImpApp = CreateObject("CognosImpromptu.Application")

        'Open Impromptu catalog
        objImpApp.OpenCatalog("C:\Program Files\cognos\cer5\Deltek\IMP74GCSP41\Catalog\All Tables.cat")
        'Open the report that will be exported to text format
        objImpRep = objImpApp.OpenReport(StrReport)
        objImpRep = objImpApp.ActiveDocument
        ' objImpRep.ExportAscii(StrText, , -1) 
        objImpRep.ExportAscii(StrText, 0, -1, , 0)
        objImpRep = Nothing
        objImpApp = Nothing
        MsgBox("Cognos Done")

    End Sub

Thanks