The following code worked for me. You need to obviously replace the repository and folder ids with your ones.
ObjectWebService.ObjectServicePortClient objProxy = new StatementsOnlinePOC.ObjectWebService.ObjectServicePortClient();
ObjectWebService.cmisProperty[] cmisPropertis = { new ObjectWebService.cmisPropertyString { name = "Name", value = new string[] { "test.pdf" } } };
ObjectWebService.cmisPropertiesType cmisPropertiesType = new ObjectWebService.cmisPropertiesType { Items = cmisPropertis };
ObjectWebService.cmisContentStreamType cmisContentStreamType = new StatementsOnlinePOC.ObjectWebService.cmisContentStreamType();
using (FileStream fsSource = new FileStream("test.pdf", FileMode.Open, FileAccess.Read))
{
// Read the source file into a byte array.
byte[] bytes = new byte[fsSource.Length];
int numBytesToRead = (int)fsSource.Length;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = fsSource.Read(bytes, numBytesRead, numBytesToRead);
// Break when the end of the file is reached.
if (n == 0)
break;
numBytesRead += n;
numBytesToRead -= n;
}
cmisContentStreamType.length = bytes.Length.ToString();
cmisContentStreamType.stream = bytes;
cmisContentStreamType.mimeType = "application/pdf";
string s = objProxy.createDocument("23d59f4c-166a-44bb-a3cb-f849d3858eec", "document", cmisPropertiesType, "workspace://SpacesStore/362a0fb0-6336-417f-b0f5-1aabe3bed663", cmisContentStreamType, ObjectWebService.enumVersioningState.major);
