private void addValueToolStripButton_Click(object sender, EventArgs e)
        {
            int index = valuesToolStripComboBox.SelectedIndex;

            if (index != -1)
            {
                string selected = (string)valuesToolStripComboBox.Items[index];

                KeyValuePairSerializeable newKeyValuePairSerializeable = new KeyValuePairSerializeable();

                newKeyValuePairSerializeable.Key = selected;

                AddIfNotPresent(cloudSaveKeys, newKeyValuePairSerializeable, true);
            }
        }
        private void AddIfNotPresent(List <KeyValuePairSerializeable> list, KeyValuePairSerializeable keyValuePairSerializeable, bool showError = false)
        {
            bool contains = list.Any(p => p.Key == keyValuePairSerializeable.Key);

            if (contains)
            {
                if (showError)
                {
                    MessageBox.Show("Value already exists in the table !", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            else
            {
                list.Add(keyValuePairSerializeable);

                bindingSource.ResetBindings(false);
            }
        }