C's method of getting the maximum and minimum values in an array

Obtain the maximum and minimum values in the array from the following functions.Pass Array Range 1 float Type Variable Directly on Call

 public float MaxOfList(float[] flotNum)
    {
      float maxValue = flotNum.ToArray().Max();

      return maxValue;
    }

    public float MinOfList(float[] flotNum)
    {
      float minValue = flotNum.ToArray().Max();
      for (int i = 0; i < flotNum.Length; ++i)
      {
        if ((flotNum[i] > -9999.0f) && (minValue > flotNum[i]))
        {
          minValue = flotNum[i];
        }
      }

      return minValue;
    }