List<ConvParam> list = new List<ConvParam>();
ConvParam conv1 = new ConvParam();
conv1.get_conversation_list_param_conv_id = "group_conv_id";
conv1.get_conversation_list_param_conv_type = TIMConvType.kTIMConv_Group;
list.Add(conv1);
ConvParam conv2 = new ConvParam();
conv2.get_conversation_list_param_conv_id = "c2c_conv_id";
conv2.get_conversation_list_param_conv_type = TIMConvType.kTIMConv_C2C;
list.Add(conv2);
TIMResult res = TencentIMSDK.ConvGetConvInfo(list, (int code, string desc, List<ConvInfo> info_list, string user_data)=>{
 // Process the async logic
});