Accessing dynamically created stored procedure from LINQ

CREATE PROCEDURE [dbo].[proc_StatsDay] @columns NVARCHAR(64) AS

DECLARE @SQL_PVT1 NVARCHAR(512), @SQL_PVT2 NVARCHAR(512), @SQL_FULL NVARCHAR(4000);

SET @SQL_PVT1 =  'SELECT OrderTime, ' + LEFT(@columns,LEN(@columns)-1) +'
FROM (SELECT ES.Location, CONVERT(varchar(10), ES.OrderTime, 120),ES.Charge
        FROM dbo.log_sales ES
        ) AS D (Location,OrderTime,Charge)
        PIVOT (SUM (D.Charge) FOR D.Location IN
            (';
SET @SQL_PVT2 = ') )AS PVT
ORDER BY OrderTime DESC';

SET @SQL_FULL = @SQL_PVT1 + LEFT(@columns,LEN(@columns)-1) +
@SQL_PVT2;

EXEC sp_executesql @SQL_FULL, N'@columns NVARCHAR(64)',@columns = @columns

public class DynamicResult
{
  public DateTime OrderDate {get;set;}
  public decimal? Location1 {get;set;}
  public decimal? Location2 {get;set;}
//..
  public decimal? Location100 {get;set;}
}

IEnumerable<DynamicResult> result =
  myDataContext.ExecuteQuery<DynamicResult>(commandString, param1);

SELECT ES.Location, DateAdd(dd, DateDiff(dd, 0, ES.OrderTime), 0),ES.Charge
FROM dbo.log_sales ES

public class LogSale
{
  public string Location {get;set;}
  public DateTime OrderDate {get;set;}
  public decimal Charge {get;set;}
}

List<LogSale> source = LoadData();
var pivot = source
  .GroupBy(ls => ls.OrderDate)
  .OrderBy(g => g.Key)
  .Select(g => new {
     Date = g.Key,
     Details = g
       .GroupBy(ls => ls.Location)
       .Select(loc => new {
          Location = loc.Key,
          Amount = loc.Sum(ls => ls.Charge)
       })
     });

var pivot = source
  .GroupBy(ls => ls.OrderDate)
  .OrderBy(g => g.Key)
  .Select(g => new XElement("Date",
    new XAttribute("Value", g.key),
    g.GroupBy(ls => ls.Location)
     .Select(loc => new XElement("Detail",
       new XAttribute("Location", loc.Key),
       new XAttribute("Amount", loc.Sum(ls => ls.Charge))
     ))
  ));