How to Sort Large CSV files using IO.Streamreader

I have large csv file 150 MB file with 5 columns and I would like to sort using Io.streamreader rather than using below command as it very slow on larger files.
import -csv  "c:\temp\test.csv"| sort col1,col2,col3 ,col4,col5 | export-csv "c:\temp\test1.csv"
Is there way to read csv file using  System.IO.StreamReader and sort and write to a new file.
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What happens when you do this?
$csv = import-csv  "c:\temp\test.csv"
$csv | sort col1,col2,col3 ,col4,col5 | export-csv "c:\temp\test1.csv"

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When you write "very slow", what do you mean?

What happens when you do this:
import-csv  "c:\temp\test.csv" | sort col5 | export-csv "c:\temp\test5.csv"
import-csv  "c:\temp\test5.csv" | sort col4 | export-csv "c:\temp\test4.csv"
import-csv  "c:\temp\test4.csv" | sort col3 | export-csv "c:\temp\test3.csv"
import-csv  "c:\temp\test3.csv" | sort col2 | export-csv "c:\temp\test2.csv"
import-csv  "c:\temp\test2.csv" | sort col1 | export-csv "c:\temp\test1.csv"

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I'm not aware of any sorting capabilities by the IO.StreamReader
What are the data types of the five columns?

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