public ColumnMappingField(FieldInfo field, ColumnAttribute attribute)
 {
     this._Field = field;
     this._ColumnName = string.IsNullOrEmpty(attribute.ColumnName) ? field.Name : attribute.ColumnName;
     this._ColumnType = attribute.ColumnType;
     this._ColumnId = attribute.ColumnId;
 }
 public ColumnMappingProperty(PropertyInfo Property, ColumnAttribute attribute)
 {
     this._Property = Property;
     this._ColumnName = string.IsNullOrEmpty(attribute.ColumnName) ? Property.Name : attribute.ColumnName;
     this._ColumnType = attribute.ColumnType;
     this._ColumnId = attribute.ColumnId;
 }