C# 常用方法

转换为UTF8编码

public static string UTF16To8(string str)
{
    byte[] utf16Bytes = Encoding.Unicode.GetBytes(str);
    byte[] utf8Bytes = Encoding.Convert(Encoding.Unicode, Encoding.UTF8, utf16Bytes);
    return Encoding.UTF8.GetString(utf8Bytes);
}

DateTime转换为10位时间戳（单位：秒），参考：https://www.cnblogs.com/minotauros/p/10773258.html

/// <summary>
/// DateTime转换为10位时间戳（单位：秒）
/// </summary>
private uint DateTimeToStamp(DateTime dateTime)
{
    DateTime startTime = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
    return (uint)(dateTime.ToUniversalTime() - startTime).TotalSeconds;
}