Error While reading with entity framework

I have a problem with reading data from a table with Entity Framework.

What I'm trying to do is read a row from table by Id.

This is my SQL table definition:

CREATE TABLE [dbo].[Wares] (
    [Ware_ID]       INT           IDENTITY (1, 1) NOT NULL,
    [WareType_ID]   INT           NOT NULL,
    [Model_ID] INT           NOT NULL,
    [Ware_Price]    FLOAT (53)    CONSTRAINT [DF_Wares_Ware_Price] DEFAULT ((0)) NOT NULL,
    [Ware_Count]    INT           CONSTRAINT [DF_Wares_Ware_Count] DEFAULT ((0)) NOT NULL,
    [Ware_Brand]    NVARCHAR (30) CONSTRAINT [DF_Wares_Ware_Brand] DEFAULT (N'') NOT NULL,
    [Ware_Image]    VARCHAR (200) NULL,
    CONSTRAINT [PK_Wares] PRIMARY KEY CLUSTERED ([Ware_ID] ASC),
    CONSTRAINT [FK_Wares_WareTypes] FOREIGN KEY ([WareType_ID]) REFERENCES [dbo].[WareTypes] ([WareType_ID]) ON DELETE CASCADE ON UPDATE CASCADE,
    CONSTRAINT [FK_Wares_Models] FOREIGN KEY ([PhoneModel_ID]) REFERENCES [dbo].[Models] ([Model_ID]) ON DELETE CASCADE ON UPDATE CASCADE
);

And this is my class definition:

public class Ware
{
    [Key]
    public int Ware_ID { get; set; }

    public int WareType_ID { get; set; }

    public int PhoneModel_ID { get; set; }

    public float Ware_Price { get; set; }

    public int Ware_Count { get; set; }

    public string Ware_Brand { get; set; }

    public string Ware_Image { get; set; }

    public virtual WareType WareType { get; set; }
}

I want to read the Id from a query string and use it to select the row:

private Ware ThisWare()
{
    string strid = Request.QueryString["id"];
    int id = Convert.ToInt32(strid);

     var context = EFDBContext.ReturnNewContext();
     var query = from m in context.Wares where m.Ware_ID == id select m;

     if (query.Count() == 1)
         return query.First();
     else return null;
}

I get the error from the line: return query.First();

This the error description:

An exception of type 'System.InvalidOperationException' occurred in EntityFramework.dll but was not handled in user code

Additional information: The 'Ware_Price' property on 'Ware' could not be set to a 'System.Double' value. You must set this property to a non-null value of type 'System.Single'.

Does anybody know how I can fix this?

P.S.: I have already tried changing Ware_Price to System.Single type but it still didn't work.