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Why does Linq need a customizer for a read-only object property?

I am using Linq DataContext.ExecuteQuery ("some sql statement") to populate a list of objects

var incomes = db.ExecuteQuery<IncomeAggregate>(sqlIncomeStatement(TimeUnit));

IncomeAggregate is an object that I created to store the results of this query.

One of the properties of this object is YQM:

public int Year { get; set; }
public int Quarter { get; set; }
public int Month { get; set; }

public string YQM 
{ 
    get { return string.Format("Y{0}-Q{1}-M{2}", Year, Quarter, Month); } 
}
... more properties

Everything compiles in order, but when it executes Linq, I get the following error:

Unable to assign value to YQM member. It does not define a setter.

But it is clear that I do not want to “install” it. Y, Q and M are provided by a query to the database. The request is not requested by YQM. Do I need to somehow change the definition of my object? (I just started using Linq, and I'm still gaining speed, so it can be very simple)

+5
2

, , , ,

public string YQM {
    get 
    { 
        return string.Format("Y{0}-Q{1}-M{2}", Year, Quarter, Month); 
    }

    private set { ;} 
}

, .

+6

Linq , , , , YQM, . YQM :

public string YQM() 
{ 
    return string.Format("Y{0}-Q{1}-M{2}", Year, Quarter, Month);  
}
+1

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