<chore>

src/Extensions/LongExtensions.cs

@@ -0,0 +1,27 @@
+namespace NSExt.Extensions;
+
+public static class LongExtensions
+{
+    /// <summary>
+    ///     判断枚举是否包含某个位
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <param name="me"></param>
+    /// <param name="flag"></param>
+    /// <returns></returns>
+    public static bool HasFlag<T>(this long me, T flag) where T : Enum
+    {
+        var val = (long)(object)flag;
+        return (me & val) == val;
+    }
+
+    /// <summary>
+    ///     1970毫秒数转换成日期对象
+    /// </summary>
+    /// <param name="msFrom1970"></param>
+    /// <returns></returns>
+    public static DateTime Time(this long msFrom1970)
+    {
+        return new DateTime(1970, 1, 1).AddMilliseconds(msFrom1970).ToLocalTime();
+    }
+}