Unhandled Exception:
System.ArgumentNullException: Argument cannot be null.
Parameter name: String
at System.Number.StringToNumber (System.String str, NumberStyles options, System.NumberBuffer& number, System.Globalization.NumberFormatInfo info, Boolean parseDecimal) [0x00000] in <filename unknown>:0
at System.Number.ParseInt32 (System.String s, NumberStyles style, System.Globalization.NumberFormatInfo info) [0x00000] in <filename unknown>:0
at System.Int32.Parse (System.String s) [0x00000] in <filename unknown>:0
at Test.Main () [0x00000] in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Argument cannot be null.
Parameter name: String
at System.Number.StringToNumber (System.String str, NumberStyles options, System.NumberBuffer& number, System.Globalization.NumberFormatInfo info, Boolean parseDecimal) [0x00000] in <filename unknown>:0
at System.Number.ParseInt32 (System.String s, NumberStyles style, System.Globalization.NumberFormatInfo info) [0x00000] in <filename unknown>:0
at System.Int32.Parse (System.String s) [0x00000] in <filename unknown>:0
at Test.Main () [0x00000] in <filename unknown>:0