如果是除去末尾特定字符或字符串：TrimEnd方法性能优于Remove方法

Stopwatch watcher = new Stopwatch();

watcher.Reset();
watcher.Start();
int count = 1000000;
List<string> strList = new List<string>();
for (int i = 0; i < count; i++)
{
strList.Add(i.ToString());
}

#region 测试用例--除去末尾特定字符或字符串，Remove方法和TrimEnd方法的比较
string result;

#region Remove方法
watcher.Reset();
watcher.Start();
StringBuilder builder = new StringBuilder();
foreach (string item in strList)
{
builder.Append(item);
builder.Append(',');
}
result = builder.Remove(builder.Length - 1, 1).ToString();
Console.WriteLine("StringBuilder.Remove:{0}", watcher.ElapsedMilliseconds);
#endregion

#region TrimEnd方法
watcher.Reset();
watcher.Start();
result = builder.ToString().TrimEnd(',');
Console.WriteLine("StringBuilder.TrimEnd:{0}", watcher.ElapsedMilliseconds);
#endregion

/*************************************************
* 测试用例：除去末尾特定字符或字符串，Remove方法和TrimEnd方法的比较
* 结论：如果是除去末尾特定字符或字符串：TrimEnd方法性能优于Remove方法
* 测试结果如下：(时间为毫秒)
* --------------------------------------
* 数据：   | 10W    | 100W  |  1000W
* --------------------------------------
* Remove   |  7    |   81   |   786
* ---------------------------------------
* TrimEnd  |  0    |   12   |   108
*
*/

#endregion