c# - How to count more than one distinct columns in linq to sql? -


i struggling linq, hence lame question still .. have table following 4 columns

pid   sku    colorid   sizeid 1     'a65102'    38       2 2     'a65102'    38       4 3     'a65102'    38       18

i have how many different color , size option available this.

in sql, use by:

select count(distinct [sizeid]) ,count(distinct [colors])  [item_master]  sku = 'a65102'

but in linq, can values 

var dd = (from im in db.item_masters            im.sku.contains("a65102")            select new {im.sizeid,im.colors });

but how can count of distinct values both in single query?

you use groupby:

var distinctcounts = db.item_masters.groupby(im => im.sku)     .where(grp => grp.key == "a65102")     .select(grp => new {          cntsizes  =  grp.select(im => im.sizeid).distinct().count(),         cntcolors =  grp.select(im => im.colorid).distinct().count()     });

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