C# Joining 3 Lists with Linq -


i want join 3 lists have following format:

list1:   countryid | countrydata     | regionuid   ===================================          12 | has gras   | 4567          12 | nice weather    | 6789          16 | stormy weather  | 1234  list2:   countryid | countryname   =======================          12 | green hill          16 | stormy mountain  list3:   regionuid | regionname   =======================        4567 | above 1000feet        6789 | on ground        1234 | on hill

output should like: 

countryname      | countrydata      | regionname ==============================================  green hill      | has gras    | above 1000feet  green hill      | nice weather     | on ground  stormy mountain | stormy weather   | on hill

where region unique , country can fit multiple lines

you want this:

var list1 = new []{     new { countryid = 12, countrydata = "has gras", regionuid = 4567  },     new { countryid = 12, countrydata = "nice weather", regionuid = 6789  },     new { countryid = 16, countrydata = "stormy weather", regionuid = 1234 }};  var list2 = new []{     new { countryid = 12, countryname = "green hill"},     new { countryid = 16, countryname = "stormy mountain"} };  var list3 = new []{     new {regionuid = 4567, regionname = "above 1000feet"},     new {regionuid = 6789, regionname = "on ground"},     new {regionuid = 1234, regionname = "on hill"} };  var result = m1 in list1     join m2 in list2 on m1.countryid equals m2.countryid     select new { m2.countryname, m1.countrydata, m1.regionuid } intermediate     join m3 in list3 on intermediate.regionuid equals m3.regionuid     select new { intermediate.countryname, intermediate.countrydata, m3.regionname};

rw


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