How to make a line fill symbol

Making a line fill symbol

Public Sub LineFillSymbol()
    ' Set the color for the line symbol in the fill.
    Dim rgbColorCls As ESRI.ArcGIS.Display.IRgbColor=New ESRI.ArcGIS.Display.RgbColorClass
    With rgbColorCls
        .Red=138
        .Green=151
        .Blue=255
    End With
    
    ' Create the line symbol to be used.
    Dim cartographicLineSymbolCls As ESRI.ArcGIS.Display.ICartographicLineSymbol=New ESRI.ArcGIS.Display.CartographicLineSymbolClass
    With cartographicLineSymbolCls
        .Cap=ESRI.ArcGIS.Display.esriLineCapStyle.esriLCSButt
        .Join=ESRI.ArcGIS.Display.esriLineJoinStyle.esriLJSMitre
        .Color=rgbColorCls
        .Width=2
    End With
    
    ' Create the line fill symbol.
    Dim lineFillSymbolCls As ESRI.ArcGIS.Display.ILineFillSymbol=New ESRI.ArcGIS.Display.LineFillSymbolClass
    With lineFillSymbolCls
        .Angle=45
        .Separation=10
        .Offset=5
    End With
    
    lineFillSymbolCls.LineSymbol=cartographicLineSymbolCls
    
End Sub

public void LineFillSymbol()
{
    // Set the color for the line symbol in the fill.
    ESRI.ArcGIS.Display.IRgbColor rgbColorCls=new
        ESRI.ArcGIS.Display.RgbColorClass();
    rgbColorCls.Red=138;
    rgbColorCls.Green=151;
    rgbColorCls.Blue=255;

    // Create the line symbol to be used.
    ESRI.ArcGIS.Display.ICartographicLineSymbol cartographicLineSymbolCls=new
        ESRI.ArcGIS.Display.CartographicLineSymbolClass();
    cartographicLineSymbolCls.Cap=ESRI.ArcGIS.Display.esriLineCapStyle.esriLCSButt;
    cartographicLineSymbolCls.Join =
        ESRI.ArcGIS.Display.esriLineJoinStyle.esriLJSMitre;
    cartographicLineSymbolCls.Color=rgbColorCls;
    cartographicLineSymbolCls.Width=2;

    // Create the line fill symbol.
    ESRI.ArcGIS.Display.ILineFillSymbol lineFillSymbolCls=new
        ESRI.ArcGIS.Display.LineFillSymbolClass();
    lineFillSymbolCls.Angle=45;
    lineFillSymbolCls.Separation=10;
    lineFillSymbolCls.Offset=5;
    lineFillSymbolCls.LineSymbol=cartographicLineSymbolCls;
}

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