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Alex Rivera
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For example, how can I group the following records by GroupId using LINQ, and sum all other columns in each group? (thus merging all rows in each group into one) var list = new List<Foo>() { new Foo() { GroupId = 0, ValueA = 10, ValueB = 100 }, new Foo() { GroupId = 1, ValueA = 30, ValueB = 700 }, new Foo() { GroupId = 1, ValueA = 40, ValueB = 500 }, new Foo() { GroupId = 2, ValueA = 80, ValueB = 300 }, new Foo() { GroupId = 2, ValueA = 20, ValueB = 200 }, new Foo() { GroupId = 2, ValueA = 20, ValueB = 200 } }; Expected result is : | GroupId | ValueA | ValueB | |---------|--------|--------| | 0 | 10 | 100 | | 1 | 70 | 1200 | | 2 | 120 | 700 |
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