private void UnloadPackage(string packageName)//Parameter added by Anil
{
string parentDir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location).Replace('\\', '/') + "/R Packages";
this.EvaluateNoReturn("library(tools)");
this.EvaluateNoReturn(@"detach(package:" + packageName + ")");
this.EvaluateNoReturn(@"remove.packages('" + packageName + "')");
}