/// <summary>
/// Returns a new DataFrame with an alias set.
/// Reference to https://github.com/apache/spark/blob/branch-1.4/python/pyspark/sql/dataframe.py, alias(self, alias) </summary>
/// <param name="alias">The alias of the DataFrame</param>
/// <returns>A new DataFrame with an alias set</returns>
public DataFrame Alias(string alias)
{
return(new DataFrame(dataFrameProxy.Alias(alias), sparkContext));
}