ARRAYS IN c#:

c# treats multidimensional arrays as "arrays of arrays".Simplest form of multidimensional array is 2-dimensional array.
2-dimensional array is declared as:
int[ , ] Array_name=new int[rows,columns];        //rectangular array
eg:
   int[ , ] array=new int[3,3];



second is variable size arrays that are knows as jagged arrays.
The jagged array is two dimensional array having different length for each row.It can be declared as:
              int[ ][ ] array_name=new [row][column];
eg:
           int[ ][ ] array=new int[3][ ];          //three rows array
           array[0]=new int[1];                  //first row has one element
           array[1]=new int[2];             //2nd row has two
           array[2]=new int[3];             //3rd row has three elements