LINQ: Get Table Column Names

The below code will worked from returns all the column names of the table

var columnnames = from t in typeof(table_name).GetProperties() select t.Name

Maybe It is too late but, I solved this problem by this code

var db = new DataContex();
var columnNames = db.Mapping.MappingSource
                      .GetModel(typeof(DataContex))
                      .GetMetaType(typeof(_tablename))
                      .DataMembers;