System.EntryPointNotFoundException: 'Unable to find an entry point named 'getCalculatedFitting' in DLL 'BPCalculationDLL.dll'.'[DllImport("BPCalculationDLL.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "getCalculatedFitting")]
public static extern int getCalculatedFitting(float[] fittinglData, uint length, char ch);