HttpHeadersContentType 字段
            Content-Type 标头,指定伴随正文数据的 MIME 类型。
            
命名空间: TouchSocket.Http程序集: TouchSocket.Http (在 TouchSocket.Http.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
public const string ContentType = "Content-Type"
Public Const ContentType As String = "Content-Type"
static val mutable ContentType: string
字段值
String