C# Jagged Array check if value exists/true -

this code , using 2 dimension array .

top = 0; if(rowcol[i-1][j]){ top = rowcol[i-1][j] } 

but shows error :

cannot implicitly convert type 'string' 'bool'

full code :

 string[] filedata = file.readalllines(@"c:\users\apr13mpsip\desktop\oneorganizer\oneorganizer\wordpuzzle\testing.txt");          string[] linevalues;          int row = 0;         int col;          string[][] rowcol = new string[filedata.length][];          foreach (string line in filedata)         {             linevalues = line.split(new string[] { "," }, stringsplitoptions.none);               rowcol[row] = new string[linevalues.length];              col = 0;              foreach (string value in linevalues)             {                 rowcol[row][col] = value;                 col++;             }             row++;          }           (int = 0; < rowcol.getlength(0) ; i++)         {             (int j = 0; j < rowcol[i].getlength(0) ; j++)             {                   int iadd =  i+1 <rowcol.getlength(0) ? + 1: 0;                 int iminus =   i-1> 0  ? - 1 : 0;                 int jadd =  j+1 <rowcol.getlength(0) ? j + 1 : 0;                 int jminus = j-1 > 0 ? j - 1 : 0;                 var self = rowcol[i][j]; // current value                  top = 0; if(rowcol[iminus][j]){ top = rowcol[iminus][j] } // error here } } 

i reading textfile , creating out of creating rows , cols 10x10 in jagged array. find value rowcol[][] .

because

if(rowcol[i-1][j]) 

will return string per definition

string[][] rowcol 

and if statement needs bool. need check against like

if(rowcol[i-1][j] == "stringtotest")