How can you read a CSV file in c# with different number of columns

I'm a beginner with c#, I have a csv file of integer data with 140 rows and every row has different number of columns csv file looks like this:

1,1,2,2,3

1,2,2,2,4,4,4,4

6,7

how can i load every row into a new array using a loop which has similar action like

int[][] inputSequences = {

    new[] { 1, 1, 2, 2, 3 },        
    new[] { 1, 2, 2, 2, 4, 4, 4, 4 },     
    new[] { 6, 7 },     

}