C# - Merge two DataTables where rows are duplicate

问题

I can find lots of information about merging two DataTables and dropping duplicate rows, but I need the opposite.

I need to know if anyone has an easy way to merge two DataTables where the result of the merge is a DataTable with only rows that exist in both tables.

回答1:

Like this:

var intersection = table1.AsEnumerable()
                         .Intersect(table2.AsEnumerable(), DataRowComparer.Default);

DataRowComparer compares rows by their column values.

来源：https://stackoverflow.com/questions/6833454/c-sharp-merge-two-datatables-where-rows-are-duplicate