Implement Fibbonachi Functionality

Program.cs

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+
+int amount;
+
+ASK_INPUT:
+Console.WriteLine("Enter how many numbers you want to compute:");
+string input = Console.ReadLine();
+
+if(!Int32.TryParse(input, out amount)){
+    Console.WriteLine("Input Wasn't a Number!");
+    goto ASK_INPUT;
+}
+
+// Declare Variables used for Calculation
+System.Numerics.BigInteger themp;
+System.Numerics.BigInteger a = 1;
+System.Numerics.BigInteger b = 1;
+
+for (int i = 1; i < amount + 1; i++)
+{
+    Console.WriteLine($"{i}: {a}\n");
+    themp = a;
+    a = a + b;
+    b = themp;
+}