Group by linq multiple columns C#

var query = (from t in Transactions
             group t by new {t.MaterialID, t.ProductID}
             into grp
                    select new
                    {
                        grp.Key.MaterialID,
                        grp.Key.ProductID,
                        Quantity = grp.Sum(t => t.Quantity)
                    }).ToList();

Source: stackoverflow.com

Linq group by multiple

.GroupBy(x => new { x.Column1, x.Column2 })

Source: stackoverflow.com

Similar codes

0 vote154 views1 answer
Unity apply bloom of a different color
C#Unity
5 votes126 views7 answers
If statement
C#
0 vote119 views2 answers
C# program exit
C#
0 vote117 views1 answer
Windows form toolbox enter key
C#
0 vote137 views1 answer
Detect mouse in bottom of screen + unity
C#Unity
0 vote114 views1 answer
IOS app crashing on ios 15 unity
C#
11 votes113 views3 answers
C# unity detect any keyboard input
C#
3 votes150 views1 answer
Smallint c#
C#
2 votes109 views2 answers
Get diff btw datetimes two C#
C#
1 vote113 views1 answer
Unity Bullet script
C#