c# console program

Jun 19 2014 3:44 AM
1-wap in c# to find distinct no in an array and if not then return -1
i.e{1,2,2,3,4,3,1}.The output will be 4.if there is no distinct element it returns -1.The program should be dynamic.
 
2-Rearrange the string ,if the string is    "STUDENT" the o/p will be "STTNUED".This program should be dynamic. 

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