How do I print an n-line diamond in C #? Practical explanation

The idea of solving problems: First we print a diamond of n rows, the general diamond is odd line (look at a little), so we print out is an odd line of diamond, generally this form:

problem-solving ideas: We can think of the diamond as two parts, as the above a positive triangle and the following an anti-triangular composition, and then we can print out separately.

Console.WriteLine ("Enter a positive integer greater than 2"); / / at least 3 lines to produce a diamond, enter an even diamond is this even number minus 1 line
            Int n = Convert.ToInt32(Console.ReadLine()); for (int i = 1; i <= (n + 1) / 2; i++) //Print the upper part of the diamond
            { for (int j = (n - 1) / 2; j >= i; j--)
                { //Print spaces
                    Console.Write(" ");
                } for (int k = 1; k <= i * 2 - 1; k++)
                { //Print the "*" number, the i-th line has i*2-1 "*"
                    Console.Write("*");
                }
                Console.WriteLine();
            } for (int i = (n - 1) / 2; i >= 1; i--)//Printing the part below the diamond is the same as the above part
            { for (int j = i - 1; j < (n - 1) / 2; j++)
                {
                    Console.Write(" ");
                } for (int k = 1; k <= i * 2 - 1; k++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            } 

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