У меня есть следующий запрос LINQ:

var timesheets = from timesheet in entities.Timesheets
    join timesheetTask in entities.Timesheet_Task on timesheet.Id equals timesheetTask.Timesheet_Id
    join task in entities.Tasks on timesheetTask.Task_Id equals task.Id
    join project in entities.Projects on task.Project_Id equals project.Id
    join department in entities.Departments on project.Department_Id equals department.Id
    where timesheet.Employee_Id == employeeId
    select new
    {
       date = timesheet.Date,
       taskName = task.Name,
       projectName = project.Name,
       projectDesc = project.Description,
       departmentName = department.Name,
       taskEstimatedHours = task.Estimated_Hours,
       timesheetHours = timesheetTask.Hours
    };  

Как я могу поместить эти результаты в DataTable, который затем я могу связать с элементом управления DataGridView?

Это то, что ям в настоящее время занимаюсь:

    table.Columns.Add("date");
    table.Columns.Add("taskName");
    table.Columns.Add("projectName");
    table.Columns.Add("projectDesc");
    table.Columns.Add("departmentName");
    table.Columns.Add("taskEstimatedHours");
    table.Columns.Add("timesheetHours");

    foreach (var item in timesheets)
    {
        table.Rows.Add(item.date, item.taskName, item.projectName,
            item.projectDesc, item.departmentName, item.taskEstimatedHours,
            item.timesheetHours);
    }
}

Обновить: Вот мой обновленный код:

DataTable table = new DataTable();

using (PTMS_DataEntities entities = new PTMS_DataEntities())
{
    var timesheets = from timesheet in entities.Timesheets
                     join timesheetTask in entities.Timesheet_Task on timesheet.Id equals timesheetTask.Timesheet_Id
                     join task in entities.Tasks on timesheetTask.Task_Id equals task.Id
                     join project in entities.Projects on task.Project_Id equals project.Id
                     join department in entities.Departments on project.Department_Id equals department.Id
                     where timesheet.Employee_Id == employeeId
                     select new
                     {
                         date = timesheet.Date,
                         taskName = task.Name,
                         projectName = project.Name,
                         projectDesc = project.Description,
                         departmentName = department.Name,
                         taskEstimatedHours = task.Estimated_Hours,
                         timesheetHours = timesheetTask.Hours
                     };

    table.Columns.Add("date", typeof(DateTime));
    table.Columns.Add("taskName", typeof(string));
    table.Columns.Add("projectName", typeof(string));
    table.Columns.Add("projectDesc", typeof(string));
    table.Columns.Add("departmentName", typeof(string));
    table.Columns.Add("taskEstimatedHours", typeof(int));
    table.Columns.Add("timesheetHours", typeof(int));

    List list = new List();
    foreach (var item in timesheets)
    {
        //table.Rows.Add(item.date, item.taskName, item.projectName,
        //    item.projectDesc, item.departmentName, item.taskEstimatedHours,
        //    item.timesheetHours);

        var row = table.NewRow();

        row.SetField("date", item.date);
        row.SetField("taskName", item.taskName);
        row.SetField("projectName", item.projectName);
        row.SetField("projectDesc", item.projectDesc);
        row.SetField("departmentName", item.departmentName);
        row.SetField("taskEstimatedHours", item.taskEstimatedHours);
        row.SetField("timesheetHours", item.timesheetHours);

        list.Add(row);
    }

    table = list.CopyToDataTable();
}

Вот SQL-запрос, который я тестировал в SSMS (который должен быть эквивалентным запросу LINQ):

SELECT dbo.Department.Name, dbo.Task.Name AS Expr1, dbo.Task.Estimated_Hours, dbo.Timesheet.Date, dbo.Project.Name AS Expr2, dbo.Project.Description, 
                  dbo.Timesheet_Task.Date AS Expr3
FROM     dbo.Department INNER JOIN
                  dbo.Project ON dbo.Department.Id = dbo.Project.Department_Id INNER JOIN
                  dbo.Task ON dbo.Project.Id = dbo.Task.Project_Id INNER JOIN
                  dbo.Timesheet_Task ON dbo.Task.Id = dbo.Timesheet_Task.Task_Id INNER JOIN
                  dbo.Timesheet ON dbo.Timesheet_Task.Timesheet_Id = dbo.Timesheet.Id