// Add a user to the blocklist
List<string> param = new List<string>
  {
    "user_id"
  };
TIMResult res = TencentIMSDK.FriendshipAddToBlackList(param, (int code, string desc, List<FriendResult> result, string user_data)=>{
 // Process the async logic
});


// Remove a user from the blocklist
List<string> param = new List<string>
  {
    "user_id"
  };
TIMResult res = TencentIMSDK.FriendshipDeleteFromBlackList(param, (int code, string desc, List<FriendResult> result, string user_data)=>{
 // Process the async logic
});

// Get the blocklist
TIMResult res = TencentIMSDK.FriendshipGetBlackList((int code, string desc, List<FriendProfile> result, string user_data)=>{
 // Process the async logic
});