Problem in DataGrid Control

[C# Programming]

I have written following code, in that i have attached Array to datagrid control, It is working fine.
But now I want the column size to be fixed.
& I am not able to do it programatically.
Any one know that how to do ?


TwoDimItem [] stuff1 = new TwoDimItem[5];
stuff1[0] = new TwoDimItem("10 : 11" , "75", "99", "26");
stuff1[1] = new TwoDimItem("10 : 12", "76", "95", "17");
stuff1[2] = new TwoDimItem("10 : 13", "60", "94", "28");
stuff1[3] = new TwoDimItem("10 : 14", "76", "95", "29");
stuff1[4] = new TwoDimItem("10 : 15", "85", "96", "24");

dataGrid1.DataSource = stuff1;

thanks