Class and properties attributes

Question

i just download a starter project for learning purpose. in this i found some tags on class as well as on properties. Can some one shade light of these? like why we use them ?

[Serializable]
    public partial class RoleToPermission
    {
        [DataMember]
        [ColumnAttribute(DbType = "int")]
        [AddEditDelete(Ignore=true)]
        public int RolePermissionID { get; set; }

        [DataMember]
        [ColumnAttribute(DbType = "int")]
        [AddEditDelete(Add = false, Delete = true)]
        public int RoleID { get; set; }

these are called Attributes msdn.microsoft.com/en-us/library/aa288454(v=vs.71).aspx — TalentTuner
– TalentTuner, Commented Mar 11, 2013 at 8:40

Community · Accepted Answer · 2017-05-23 12:21:05Z

2

Attributes are used to attach additional information onto program entities, such as a class, a property, a field or a method. At run-time, the interested code can retrieve this information using reflection.

For instance, when you use a DataContractSerializer to serialize an object, the serializer will look for any field or property that is tagged with a [DataMember] attribute. So the [DataMember] attribute allows you to declare which fields and properties should be serialized.

There exists some useful attributes, and you can also write your own attributes for other purposes.

edited May 23, 2017 at 12:21

CommunityBot

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answered Mar 11, 2013 at 9:05

Eren Ersönmez

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