LINQ - Convert List to Dictionary with Value as List

Question

I have a

List 

that I retrieve from the database. However, I would like it keyed by a property in MyObject for grouping pu

Answer 1

It sounds like you want to group the MyObject instances by KeyedProperty and put that grouping into a Dictionary>. If so then try the following

List list = ...;
var map = list
  .GroupBy(x => x.KeyedProperty)
  .ToDictionary(x => x.Key, x => x.ToList());