diff --git a/Falcon.SugarApi/StringExtend.cs b/Falcon.SugarApi/StringExtend.cs
index b8a800e..6fed262 100644
--- a/Falcon.SugarApi/StringExtend.cs
+++ b/Falcon.SugarApi/StringExtend.cs
@@ -2,8 +2,6 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
-using System.Linq;
-using System.Reflection.Metadata;
 
 namespace Falcon.SugarApi
 {
@@ -17,7 +15,7 @@ namespace Falcon.SugarApi
         /// </summary>
         /// <param name="str">字符串</param>
         /// <returns>空或null为True，否则False</returns>
-        public static bool IsNullOrEmpty(this string? str) => str == null || string.IsNullOrEmpty(str);
+        public static bool IsNullOrEmpty(this string? str) => str==null||string.IsNullOrEmpty(str);
         /// <summary>
         /// 字符串是否不为空或null
         /// </summary>
@@ -40,8 +38,7 @@ namespace Falcon.SugarApi
         /// <param name="splitChars"></param>
         /// <returns>字符串数组。当str为null时返回空数组</returns>
         public static string[] SplitStr(this string? str,params char[] splitChars)
-            => str.IsNullOrEmpty() ? Array.Empty<string>() : str.Split(splitChars.Length == 0 ? new char[] { ',','，',';','；','.','。' } : splitChars,StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
-
+            => str.IsNullOrEmpty() ? Array.Empty<string>() : str.Split(splitChars.Length==0 ? new char[] { ',','，',';','；','.','。' } : splitChars,StringSplitOptions.RemoveEmptyEntries|StringSplitOptions.TrimEntries);
 
         /// <summary>
         /// 将字符串按格式转换为时间格式
@@ -51,7 +48,7 @@ namespace Falcon.SugarApi
         /// <param name="culture">区域特性.默认CultureInfo.InvariantCulture</param>
         /// <returns>时间</returns>
         public static DateTime ToDateTime(this string str,string dateTimeFormat = "",CultureInfo? culture = null) {
-            culture ??= CultureInfo.InvariantCulture;
+            culture??=CultureInfo.InvariantCulture;
             if(dateTimeFormat.IsNullOrEmpty()) {
                 return DateTime.Parse(str);
             }
@@ -67,14 +64,24 @@ namespace Falcon.SugarApi
         /// <returns>成功True，失败False</returns>
         public static bool TryToDateTime(this string str,string dateTimeFormat,out DateTime dt,CultureInfo? culture = null) {
             try {
-                dt = str.ToDateTime(dateTimeFormat,culture);
+                dt=str.ToDateTime(dateTimeFormat,culture);
                 return true;
-            } catch(Exception) {
-                dt = default;
+            }
+            catch(Exception) {
+                dt=default;
                 return false;
             }
         }
-
+        /// <summary>
+        /// 尝试将特定格式字符串转换为DateTime类型
+        /// </summary>
+        /// <param name="str">时间字符串</param>
+        /// <param name="dt">转换后的时间</param>
+        /// <param name="dateTimeFormat">时间格式</param>
+        /// <param name="culture">区域特性.默认CultureInfo.InvariantCulture</param>
+        /// <returns>成功True，失败False</returns>
+        public static bool TryToDateTime(this string str,out DateTime dt,string dateTimeFormat = "",CultureInfo? culture = null)
+           => str.TryToDateTime(dateTimeFormat,out dt);
         /// <summary>
         /// 返回字符串是否为指定格式的日期时间格式
         /// </summary>
@@ -105,18 +112,18 @@ namespace Falcon.SugarApi
         /// <returns>子字符串</returns>
         /// <exception cref="Exception">获取长度不满足要求</exception>
         public static string SubstringEx(this string str,int start,int length) {
-            if(start > str.Length || length == 0) {
+            if(start>str.Length||length==0) {
                 return "";
             }
-            if(length < 0) {
-                start = start + length;
-                length = -length;
+            if(length<0) {
+                start=start+length;
+                length=-length;
             }
-            if(start < 0) {
-                length += start;
-                start = 0;
+            if(start<0) {
+                length+=start;
+                start=0;
             }
-            if(start + length > str.Length) {
+            if(start+length>str.Length) {
                 return str.Substring(start);
             }
             return str.Substring(start,length);
@@ -129,16 +136,16 @@ namespace Falcon.SugarApi
         /// <param name="length">分割长度</param>
         /// <returns>分割后的字符串枚举</returns>
         public static IEnumerable<string> Split(this string str,int length) {
-            if(length <= 0) {
+            if(length<=0) {
                 throw new Exception("分割长度必须大于0");
             }
             if(str.IsNullOrEmpty()) {
                 throw new ArgumentNullException(nameof(str));
             }
             int i = 0;
-            while(str.Length > i) {
+            while(str.Length>i) {
                 yield return str.SubstringEx(i,length);
-                i += length;
+                i+=length;
             }
         }
     }