https://learn.microsoft.com/ja-jp/dotnet/api/system.windows.controls.datagrid.mincolumnwidth?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
DataGrid.MinColumnWidth Property (System.Windows.Controls) | Microsoft Learn
Gets or sets the minimum width constraint of the columns and headers in the DataGrid.
property systemdatagridwindowscontrolsmicrosoft