int count = ;
//在重复名称后加(序号)
while (File.Exists(path))
{
if (path.Contains(")."))
{
int start = path.LastIndexOf("(");
int end = path.LastIndexOf(").") - path.LastIndexOf("(") + ;
path = path.Replace(path.Substring(start, end), string.Format("({0}).", count));
}
else
{
path = path.Replace(".", string.Format("({0}).", count));
}
count++;
}