Hi Guys,

Just  a quick example, Take a scenario that you are creating an Application (in our case WinForm Application). and you want to upload a document to document library from that application, there are two ways to do, One is to upload from filecreation and the other one is to directly upload with file.savebinary method.

public void uploadfile(string siteurl,string fileName,string libraryName, string subfolderPath)
{

using (ClientContext clientContext = new ClientContext(siteUrl))
{

string uploadLocation = string.Empty;
if (!string.IsNullOrEmpty(
subfolderPath))
{uploadLocation = string.Format("/{0}/{1}/", libraryName, subfolderPath);}
else
{
uploadLocation = string.Format("/{0}/", libraryName);
}

#region Upload through filecreation
var fileCreationInformation = new FileCreationInformation();

byte[] bytefile = System.IO.File.ReadAllBytes(fileName);
fileCreationInformation.Content = bytefile;
fileCreationInformation.Overwrite = true;
uploadLocation = uploadLocation + Path.GetFileName(fileName);
fileCreationInformation.Url = uploadLocation;

list.RootFolder.Files.Add(fileCreationInformation);
clientContext.ExecuteQuery();
#endregion

#region Uploading directly
using (FileStream fs = new FileStream(fileName, FileMode.Open))
{

Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, uploadLocation, fs, true);

}

#endregion

}

}