I am trying to store the csv file into an array and then compare each cell by storing it in a temp array and extract into a 1d array or a vector in C# -

var lines = file.readalllines(@"data/ap4.csv"); var pddata = new list<string[]>();  using (var stream_r = new streamreader(@ap4.csv)) {     string line;     while ((line = stream_r.readline()) != null)     {         string[] row = line.split(',');         pddata.add(row);     } } int k = 0; string[][] temp = pddata.toarray();  var se_state = new string[2000];  for(int = 1; i< rowlength;i++) {     (int j = 1; j< totalcols; j++)     {       if(temp[i][j] != "0" && temp[i][j] != se_state[k])         {             k++;             se_state[k] = temp[i][j];          }     } } 

the error : index outside bounds of array @ if loop , think se_state out of bounds exception. unable check element of temp array array 1-dimensional