tencent cloud

// conv_is_pinned 参数为 true，表示置顶会话，否则，表示取消置顶。
bool conv_is_pinned = true;
TIMResult res = TencentIMSDK.ConvPinConversation(conv_id, conv_is_pinned, (int code, string desc, string user_data)=>{
 // 处理异步逻辑
});

TencentIMSDK.SetConvEventCallback((TIMConvEvent conv_event, List<ConvInfo> conv_list, string user_data)=>{
  foreach(ConvInfo conv_info in conv_list) {
    if (conv_info.conv_is_pinned) {
      // 处理回调逻辑
    }
  }
});