myCtxtWeb.Load(item);
myCtxtWeb.ExecuteQuery();

SP.File newsItemFile = targetItem.File;
SP.FileVersionCollection fileVersions = newsItemFile.Versions;
myCtxtWeb.Load(fileVersions);
myCtxtWeb.ExecuteQuery();
if (fileVersions.Count > 0)
{

    SP.FileVersion currentVer = fileVersions[fileVersions.Count - 1];//get current version
    if (currentVer.VersionLabel == "1.0")
    {
        return "add";
    }
}