I use this to get a list of materials from my database....

  public IQueryable<MaterialsObj> FindAllMaterials()
    {
       var materials =  from m in db.Materials
           join Mt in db.MeasurementTypes on m.MeasurementTypeId equals Mt.Id
           select new MaterialsObj()
               {
                   Id = Convert.ToInt64(m.Mat_id),
                   Mat_Name = m.Mat_Name,
                   Mes_Name = Mt.Name,
               };
        return materials;
    }

But i have seen in an example that has this,

public IQueryable<MaterialsObj> FindAllMaterials()
{
   return from m in db.Materials
       join Mt in db.MeasurementTypes on m.MeasurementTypeId equals Mt.Id
       select new MaterialsObj()
           {
               Id = Convert.ToInt64(m.Mat_id),
               Mat_Name = m.Mat_Name,
               Mes_Name = Mt.Name,
           };
}

Is there a real big difference between the two methods... Assigning my linq query to a variable and returning it... Is it a good/bad practise? Any suggestion which should i use?