Upload file to document library and update the meta data using client context

public ListItem UploadDocument(String fileName, String filePath, Dictionary<string, object> metaDataList)
{
SP.ClientContext ctx = new SP.ClientContext(“http://yoursharepointURL”);

Web web = ctx.Web;

FileCreationInformation newFile = new FileCreationInformation();

newFile.Content = System.IO.File.ReadAllBytes(@"C:\TestFile.doc");

newFile.Url = "/" + fileName;

List docs = web.Lists.GetByTitle(“Shared Documents”);

Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);

// Set the file to be uploaded and define the fields to be returned
context.Load(uploadFile,
i => i.ListItemAllFields.Id
i => i.ListItemAllFields.DisplayName,
i => i.ListItemAllFields["Title"],
i => i.ListItemAllFields["FileRef"],
i => i.ListItemAllFields["Created_x0020_By"],
i => i.ListItemAllFields["File_x0020_Size"]);

SPClient.ListItem item = uploadFile.ListItemAllFields;

//Set the metadata
foreach (var meta in metaDataList)
{
item[meta.Key] = meta.Value;
}

item.Update();

context.ExecuteQuery();

return item;
}