Join two tables using linq, and fill a Dictionary of them

Question

I\'ve been searching how to join two tables (Data and DataValues, one to many) and fill a dictionary of type .

The records of Data(s) might be thousands (e.g. 500,00

Answer 1

You don't need foreach loop. Try something like this in general:

var columns = dt.Columns.Cast();
dt.AsEnumerable().Select(dataRow => columns.Select(column => 
                     new { Column = column.ColumnName, Value = dataRow[column] })
                 .ToDictionary(data => data.Column, data => data.Value));

Also, consider reading this: http://blogs.teamb.com/craigstuntz/2010/01/13/38525/