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I have a question on Union and Concat. I guess both are behaving same in case of List<T> .

var a1 = (new[] { 1, 2 }).Union(new[] { 1, 2 });             // O/P : 1 2
var a2 = (new[] { 1, 2 }).Concat(new[] { 1, 2 });            // O/P : 1 2 1 2

var a3 = (new[] { "1", "2" }).Union(new[] { "1", "2" });     // O/P : "1" "2"
var a4 = (new[] { "1", "2" …

我有两个清单.BeamElevations<Elevation>和FloorElevations<Elevation>.如何将这些合并到Elevations<Elevation>列表中并根据他们使用Linq的Elevation进行排序？