Question

I have two colluections

List<Application>  myApps;

List<Application> yourApps;

These lists have overlapping overlapping data but they are coming from different sources and each source has some missing field data.

Application object has a property called Description

Both collections have a unique field called Key

i want to see if there is a LINQ solution to:

Loop through all applications in myApps and look at the key and see if that existing in yourApps. If it does, i want to take the description property from that application in yourApps and set the description property on the application on myApps to that same value

i wanted to see if there was any slick way using lambda expressions (instead of having to have loops and a number of if statements.)

Answer 1

You can use a join:

foreach(var pair in from m in myApps
                    join y in yourApps on m.Key equals y.Key
                    select new { m, y }) {
    pair.m.Description = pair.y.Description;
}