strarr[]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18}
row=6
col=3
deimal[,] strArr1=new decimal[row,col] ;
then this array should be converted in to two dimensional as row and column given.
strArr1[,] should be like this
1 2 3
4 5 6
7 8 9
10 11 12
13 14 15
16 17 18