您只需要降低数组中的第一个字符.参见此 answer

You just need to lower the first char in the array. See this answer

Char.ToLowerInvariant(name[0]) + name.Substring(1)

作为旁注，看到要删除空格时，可以将下划线替换为空字符串.

As a side note, seeing as you are removing spaces you can replace the underscore with an empty string.

.Replace("_", string.Empty)