Linq procedure

public partial class Test
    {
        private string _employeeid;
        [Column(Storage = "_employeeid" , DbType = "NVarChar(1000) NOT NULL",Name="employeeid")]
        public string employeeid
        {
            get
            {

                return this._employeeid;
            }
            set
            {
                if ((this._employeeid != value))
                {
                    this._employeeid = value;
                }
            }
        }

    }