IfcDoc.CtlProperties.buttonEntityBase_Click C# (CSharp) Method

        private void buttonEntityBase_Click(object sender, EventArgs e)
        {
            DocEntity docEntity = (DocEntity)this.m_target;
            DocObject docBase = null;
            if (docEntity.BaseDefinition != null)
            {
                this.m_map.TryGetValue(docEntity.BaseDefinition, out docBase);
            }

            using (FormSelectEntity form = new FormSelectEntity(null, (DocEntity)docBase, this.m_project, SelectDefinitionOptions.Entity))
            {
                DialogResult res = form.ShowDialog(this);
                if (res == DialogResult.OK && form.SelectedEntity != null)
                {
                    docEntity.BaseDefinition = form.SelectedEntity.Name;
                    this.textBoxEntityBase.Text = docEntity.BaseDefinition;
                }
            }
        }