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We have a webservice that send sql tables over the net inside dataset, we had issues with size so i tried this DLL and it actually work very well (7-8 meg to 100kb) but now that i finished my test locally in a basic application i'm incorporating it to the webservice.

the function take a the dataset, compress and serialize. Then it put it into a MemoryStream Object and send it to the client applicationthen the client application pass it into a unzip function that take a stream as parameter.When i use the 2 function side by side it work but remotely i get Convert issue. I tried cast / change parameter and still give me similar error

cannot convert from 'ProjectName.WebService.MemoryStream' to 'System.IO.Stream' 

if i change my function to take memory stream this line has issue

ZipInputStream zInStream = new ZipInputStream(sObjectStream);

 even

ZipInputStream zInStream = new ZipInputStream((Stream)sObjectStream);

second one give me this error

Argument '1': cannot convert from 'ProjectName.WebService.MemoryStream' to 'System.IO.MemoryStream'

look like Webservice memory stream is not the same as application memory stream. It's weird because i force them to use same namespace function which is system.io.memorystream

any idea what i must do to make it also work with webservice ?

 Try using a byte array instead of a MemoryStream in your web service.

It's working fine with this. The size isn't much different than the stream but very close.

8.6mb to 105kb with stream now 8.6mb to 144kbwith byte wont cry for 40kb :)

thanks for the suggestion.