Risky Martin questions

Risky Martin answers

• Grouping a list into sublists by key/attribute without changing the list order (just chop into lists by attrib)
• LINQ: List of tuples to tuple of lists
• Is there a concise built-in way to get a list item by index that is not going to throw an exception?
• Multiple Select and Join with LINQ and Lambda
• Distinct on Multiple Columns Entity Framework LINQ
• DataTable Linq join many columns
• LINQ Grouping by Sum Value