Sum of subset of 5 numbers is 0 if-else

using System;

class SubsetOfNumbersIs0
{
    static void Main()
    { //Find if sum of some numbers is 0
        int a = 2;
        int b = 3;
        int c = 5;
        int d = -9;
        int e = 6;
        //All sum combinations if-else construction
        if (a + b != 0)
        {
            if (a + b + c != 0)
            {
                if (a + b + c + d != 0)
                {
                    if (a + b + c + d + e == 0)
                    {
                        Console.WriteLine(
                            "{0} + {1} + {2} + {3} + {4} = 0", a, b, c, d, e);
                    }
                }
                else
                {
                    Console.WriteLine("{0} + {1} + {2} + {3} = 0", a, b, c, d);
                }
            }
            else
            {
                Console.WriteLine("{0} + {1} + {2} = 0", a, b, c);
            }
            if (a + b + d != 0)
            {
                if (a + b + d + e == 0)
                {
                    Console.WriteLine("{0} + {1} + {2} + {3}= 0", a, b, d, e);
                }
            }
            else
            {
                Console.WriteLine("{0} + {1} + {2} = 0", a, b, d);
            }
            if (a + b + e == 0)
            {
                Console.WriteLine("{0} + {1} + {2} = 0", a, b, e);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", a, b);
        }
        if (a + c != 0)
        {
            if (a + c + d != 0)
            {
                if (a + c + e ==0)
                {
                    Console.WriteLine("{0} + {1} + {2} = 0", a, c, e);
                }
                if (a + c + d + e == 0)
                {
                    Console.WriteLine("{0} + {1} + {2} + {3} = 0", a, c, d, e);
                }
            }
            else
            {
                Console.WriteLine("{0} + {1} + {2} = 0", a, c, d);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", a, c);
        }
        if (a + d != 0)
        {
            if (a + d + e != 0)
            {
            }
            else
            {
                Console.WriteLine("{0} + {1} + {2} = 0", a, d, e);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", a, d);
        }
        if (a + e != 0)
        {

        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", a, e);
        }
        if (b + c != 0)
        {
            if (b + c + d != 0)
            {
                if (b + c + e == 0)
                {
                    Console.WriteLine("{0} + {1} + {2} = 0", b, c, e);
                }
                if (b + c + d + e == 0)
                {
                    Console.WriteLine("{0} + {1} + {2} + {3} = 0", b, c, d, e);
                }
            }
            else
            {
                Console.WriteLine("{0} + {1} + {2} = 0", b, c, d);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", b, c);
        }
        if (c + d != 0)
        {
            if (c + d + e == 0)
            {
                Console.WriteLine("{0} + {1} + {2} = 0", c, d, e);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", c, d);
        }
        if (d + e == 0)
        {
            Console.WriteLine("{0} + {1} = 0", d, e);
        }
        if (b + d != 0)
        {
            if (b + d + e == 0)
            {
                Console.WriteLine("{0} + {1} + {2} = 0", b, d, e);
            }
        }
        else
        {
            Console.WriteLine("{0} + {1} = 0", b, d);
        }
        if (b + e == 0)
        {
            Console.WriteLine("{0} + {1} = 0", b, e);
        }
        if (c + d == 0)
        {
            Console.WriteLine("{0} + {1} = 0", c, d);
        }
    }
}