private void CreateColumns()
{
//SQL Server Data Type column
DataGridViewTextBoxColumn dgvcolSqlServerDataTypeColumn = new DataGridViewTextBoxColumn();
dgvcolSqlServerDataTypeColumn.Name = "sqlServerDataTypeColumn";
dgvcolSqlServerDataTypeColumn.HeaderText = "SQL Server Data Type";
dgvcolSqlServerDataTypeColumn.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dgvcolSqlServerDataTypeColumn.DataPropertyName = "DbDataTypeName";
dgvcolSqlServerDataTypeColumn.ReadOnly = true;
dgvTypes.Columns.Add(dgvcolSqlServerDataTypeColumn);
//.Net Data Type Column
DataGridViewComboBoxColumn dgvcolDotNetDataType = new DataGridViewComboBoxColumn();
dgvcolDotNetDataType.Name = "dotNetDataType";
dgvcolDotNetDataType.HeaderText = ".Net Data Type";
dgvcolDotNetDataType.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dgvcolDotNetDataType.DataPropertyName = "DotNetDataTypeName";
dgvcolDotNetDataType.DataSource = _dataTypeService.GetAllDotNetDataTypes().ToList();
dgvTypes.Columns.Add(dgvcolDotNetDataType);
}