there is recursive function in my project and i have error that is "An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll"

[C# Programming]

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my code:
int xcontrol = 0, ebn, eb1 = 0, sonraki;

double Lhesaplax(int bn, int sn, double t, int c, int sonraki)
{
int xv;
int[] gecis = new int[5];
if (bn / nron == sn / nron) return t = t + 1;
else
t++;
Array.Resize(ref gecis, network.layers[bn / nron].noron[bn % nron].sbaglanti.Length);
Array.Copy(network.layers[bn / nron].noron[bn % nron].sbaglanti, gecis, gecis.Length);
Array.Sort(gecis);
xv = Array.BinarySearch(gecis, sn);
if (xv > -1) { t++; c = 1; }
else
{
//t++;


for (int i = 1; i < gecis.Length; i++)
{
if (gecis[i] / nron < sn / nron && eb1