Add datagridviewcolumn property development time

Question

I have this problem, I created my own datagridviewcolumn, and I want to add some properties that you can change in editing development time ... here is my code:

private int nMaxLength;
[Description("Fondoscala valore"), Category("Sea")]
public int MaxLength
{
    get { return nMaxLength; }
    set { nMaxLength = value; }
}

and in fact this is normal when you open the column editor, you see this property under the Sea category, and you can change it, but when you change it, if you go to the .Designer.cs file, you will see the MaxLength value to 0. . no change ... what's the problem ?? thanks in advance

Answer 1

, (, DataGridViewTextBoxColumn DataGridViewButtonColumn) . DataGridViewColumn Clone(), ..

public override object Clone() {
    MyDataGridViewColumn that = (MyDataGridViewColumn)base.Clone();
    that.MaxLength = this.MaxLength;
    return that;
}

Clone(), - .