How to differentiate between two similar fields in Linq Join tables - asp.net

Question

How to differentiate between two select new fields e.g. Description
c.Description and lt.Description
DataTable lDt = new DataTable();
try
{
lDt.Columns.Add(new DataColumn("AreaTypeID", typeof(Int32)));
lDt.Columns.Add(new DataColumn("CategoryRef", typeof(Int32)));
lDt.Columns.Add(new DataColumn("Description", typeof(String)));
lDt.Columns.Add(new DataColumn("CatDescription", typeof(String)));
EzEagleDBDataContext lDc = new EzEagleDBDataContext();
var lAreaType = (from lt in lDc.tbl_AreaTypes
join c in lDc.tbl_AreaCategories on lt.CategoryRef equals c.CategoryID
where lt.AreaTypeID== pTypeId
select new { lt.AreaTypeID, lt.Description, lt.CategoryRef, c.Description }).ToArray();
for (int j = 0; j< lAreaType.Count; j++)
{
DataRow dr = lDt.NewRow();
dr["AreaTypeID"] = lAreaType[j].LandmarkTypeID;
dr["CategoryRef"] = lAreaType[j].CategoryRef;
dr["Description"] = lAreaType[j].Description;
dr["CatDescription"] = lAreaType[j].;
lDt.Rows.Add(dr);
}
}
catch (Exception ex)
{
}

Answer 1

You can give them an explicit name when selecting:
select new { lt.AreaTypeID, LtDescr = lt.Description, lt.CategoryRef, CDescr = c.Description }
And then:
dr["Description"] = lAreaType[j].LtDescr;
dr["CatDescription"] = lAreaType[j].CDescr;

Answer 2

Change:
select new { lt.AreaTypeID, lt.Description, lt.CategoryRef, c.Description }
To:
select new { AreaTypeID = lt.AreaTypeID,
LtDescription = lt.Description,
CategoryRef = lt.CategoryRef,
CatDescription = c.Description }
That will give each property in the anonymous type a different explicit name rather than simply relying on the existing name. You can then access them later using:
dr["Description"] = lAreaType[j].LtDescription;
dr["CatDescription"] = lAreaType[j].CatDescription;