Use % operator to get remainder : Remainder Operator : Operator C# Examples

    
using  System;  
  
class  Example  {        
    public  static  void  Main()  {        
        int  iresult,  irem;  
        double  dresult,  drem;  
  
        iresult  =  10  /  3;  
        irem  =  10  %  3;  
  
        dresult  =  10.0  /  3.0;  
        drem  =  10.0  %  3.0;    
  
        Console.WriteLine("Result  and  remainder  of  10  /  3:  "  +  
                                              iresult  +  "  "  +  irem);  
        Console.WriteLine("Result  and  remainder  of  10.0  /  3.0:  "  +  
                                              dresult  +  "  "  +  drem);  
    }        
}