refactor: ♻️ 2.0 (#3)

src/backend/NSExt/Extensions/DecimalExtensions.cs

@@ -0,0 +1,26 @@
+namespace NSExt.Extensions;
+
+/// <summary>
+///     DecimalExtensions
+/// </summary>
+public static class DecimalExtensions
+{
+    /// <summary>
+    ///     四舍五入后的近似值
+    /// </summary>
+    /// <param name="me">me</param>
+    /// <param name="place">小数点位数</param>
+    /// <returns>处理后的值</returns>
+    public static decimal Round(this decimal me, int place)
+    {
+        return Math.Round(me, place);
+    }
+
+    /// <summary>
+    ///     ToString 的 Invariant 版本
+    /// </summary>
+    public static string ToInvString(this decimal me)
+    {
+        return me.ToString(CultureInfo.InvariantCulture);
+    }
+}