Question

A list of data object in the below format

Col1  Col2  Col3

B     45    36    
B     12    69   
A     46    76    
C     89    09    
B     451   37   
D     435   46   
A     450   50   
D     98    43   
B     358   39
A     987   89

Need to get result set like following format ( ‘A’ occurred 3 times ,’B’ occurred 4 times etc.)

Value  Count

A      3   
B      4  
C      1    
D      2

How to get result set like above using LINQ or lambda expressions?

Answer 1

You can achieve it by lambda expression like

var list = from x in dataObjects
           group x by x.Col1 into g
           select new { Value = g.Key, Count = g.Count() };

And By using Linq Extension method GroupBy as answered by @Asif