恒定值＆＃39; -1025＆＃39;无法转换为`ushort`

Question

我有一个包含需要设置和清除位字段值的函数的类。代码如下。在行

FlagsValues &= ~(UInt16)EFlagsValues.NIn;

下面我得到的错误是“常数值”-1025＆＃39;无法转换为ushort

我的代码有什么问题，为什么我会收到此错误。？

public class MySetupC 
    {

            private UInt16 m_FlagsValues;
            private UInt16 m_FlagsMask;

            public UInt16 FlagsMask { get { return m_FlagsMask; } private set { m_FlagsMask = value; } }
            public UInt16 FlagsValues { get { return m_FlagsValues; } private set { m_FlagsValues = value; } }

            [Flags]
            public enum EFlagsMask
            {
                None = 0,
                AIn = (1 << 0),  //1
                BIn = (1 << 1),  //2
                CIn = (1 << 2),  //4 
                DIn = (1 << 3), //8
                EIn = (1 << 4),  //16
                FIn = (1 << 5),  //32
                JIn = (1 << 6),
                KIn = (1 << 7),
                LIn = (1 << 8),
                MIn = (1 << 9),
                NIn = (1 << 10),
                OIn = (1 << 11),
            }

            [Flags]
            public enum EFlagsMask
            {
                None = 0,
                AIn = (1 << 0),  //1
                BIn = (1 << 1),  //2
                CIn = (1 << 2),  //4 
                DIn = (1 << 3), //8
                EIn = (1 << 4),  //16
                FIn = (1 << 5),  //32
                JIn = (1 << 6),
                KIn = (1 << 7),
                LIn = (1 << 8),
                MIn = (1 << 9),
                NIn = (1 << 10),
                OIn = (1 << 11),
            }

        public void SetNIn(bool enable)
        {
            if (enable)
            {
                FlagsValues |= (UInt16)EFlagsValues.NIn;
                FlagsMask |= (UInt16)EFlagsMask.NIn;
            }
            else
            {
                //negate
                FlagsValues &= ~(UInt16)EFlagsValues.NIn;
                FlagsMask |= (UInt16)EFlagsMask.NIn;
            }
        }
    }

Answer 1

从UInt16中获取你的枚举

public enum EFlagsMask : UInt16 {

然后，对枚举值执行〜运算符，而不是UInt16;

FlagsValues &= (UInt16)~EFlagsMask.NIn;