data table to another data table

Question

I have a data table .I want to copy some column to another data table .

data table dt=new data table();//Having four columns

data table dtcopy=new data table();//I want to copy the datatable dt first and last column  to this data table

 This is my data table(dt) column

Col1

col2

col3

col4

 

My result is:(dtcopy)

Col1

col4