Method that creates a query string to INSERT INTO within the attributes

DataNamesAttribute.cs

[AttributeUsage(AttributeTargets.Property)]
public class DataNamesAttribute : Attribute
{
    protected List<string> _valueNames { get; set; }

    public List<string> ValueNames
    {
        get
        {
            return _valueNames;
        }
        set
        {
            _valueNames = value;
        }
    }

    protected bool _useToInsertQuery { get; set; } = true;
    public bool useToInsertQuery
    {
        get
        {
            return _useToInsertQuery;
        }
        set
        {
            _useToInsertQuery = value;
        }
    }

    public DataNamesAttribute()
    {
        _valueNames = new List<string>();
    }

    public DataNamesAttribute(params string[] valueNames)
    {
        _valueNames = valueNames.ToList();
    }

    public DataNamesAttribute(bool useToInsertQuery, params string[] valueNames)
    {
        _useToInsertQuery = useToInsertQuery;
        _valueNames = valueNames.ToList();
    }
}

ProccessCreateQueryStringFromClass.cs

public abstract class BaseData {

  protected SqlCommand ProccessCreateQueryStringFromClass<T>(T obj, string table)
  {
      SqlCommand result = new SqlCommand("INSERT INTO {table} ");

      List<string> columns = new List<string>();
      List<string> values = new List<string>();

      PropertyInfo[] props = obj.GetType().GetProperties();
      foreach (PropertyInfo p in props)
      {
          DataNamesAttribute a = (DataNamesAttribute)p.GetCustomAttribute(typeof(DataNamesAttribute), true);
          object propValue = p.GetValue(obj);
          bool useToInsertQuery = a.useToInsertQuery;
          if( ( p.PropertyType == typeof(DateTime?) || p.PropertyType == typeof(DateTime) ) && propValue != null )
          {
              if( (DateTime)propValue == DateTime.MinValue )
              {
                  continue;
              }
          }

          if (a == null || propValue == null || !useToInsertQuery) continue;

          string columnName = a.ValueNames[0];
          columns.Add(columnName);

          string valueParameterReferenceName = "@" + p.Name;
          values.Add(valueParameterReferenceName);
          result.Parameters.AddWithValue(valueParameterReferenceName, propValue);
      }

      result.CommandText += $"({ String.Join(", ", columns)}) VALUES ({ String.Join(", ", values)})";
      return result;
  }
}