C# - DatagidView show full header text

I have a datagrid in my application. My datagridview columns have very long name开发者_运维知识库s and I would like that datagridview would show full text of the column header. I have tried change AutoSizeColumnMode property to ColumnHeader, but I do that then I wont be able to resize the columns, I wont be able to make the cell bigger or smaller.

Wich properties should I change so that my datagridview shows full text on the columns?

Help is very appreciated.

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In the Winform designer leave the AutoSizeColumnMode setting to ColumnHeader, but in your form's constructor (after calling InitializeComponent()) set all your DGV columns AutoSizeColumnMode property to None:

    foreach (DataGridViewColumn col in dataGridView1.Columns) {
        col.AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
    }

When your form loads your DGV Columns will be sized to the column header but your users will be able to resize column widths.