Overloading operators with the IndexerName attribute

Question

I am wondering whether it is allowed in C# to provide the IndexerName attribute defining the same name for overloaded indexers which have the same semantics. Say, for example, that you have a wrapper class for matrices of unknown size which defines two indexers, one for Int32 and one for Int64 array access:

using System.Runtime.CompilerServices;

public class Matrix
{
    private double[,] content;

    [IndexerName("Cells")]
    public double this[int row, int column]
    {
        get { return this.content[row, column]; }
        set { this.content[row, column] = value; }
    }

    [IndexerName("Cells")]
    public double this[long row, long column]
    {
        get { return this.content[row, column]; }
        set { this.content[row, column] = value; }
    }
}

So obviously, the indexers do not differ in their semantics, but in their arguments. The code will not compile, as now, the Matrix type already contains a definition for 'Cells'. Is it even valid to use the IndexerName attribute in this situtation or do I have a wrong understanding of this attribute?