将十进制数组转换为双数组

double[] doubleArray = Array.ConvertAll(decimalArray, x => (double)x);

您还可以使用和扩展类,与此类似

public static class ArrayExtension
{

   public static double[] ToDouble(this float[] arr) => 
                                    Array.ConvertAll(arr, x => (double)x);

}

然后:

double[] doubleArr = decimalArr.ToDouble();