C# Lambda - short spelling

Question

Hello,

How can I write the below code shorter, how to optimize? Maybe without function name GetDeviceWhiteParameterSet(); Directly.

? means can be null, right?

[XmlAttribute("length")]
public double? Length { get; set; }


private double _Width;
public double WidthRound     // **** not working with ? operator.   
{
 get { return _Width; }
 set { this._Width = Math.Round(value, 2); }
}


public string DeviceWhiteParameterSet => GetDeviceWhiteParameterSet();

public string GetDeviceWhiteParameterSet()
{
 string ret = "";
 if (DeviceWhiteParameterSet1.Length != 0)
 ret += DeviceWhiteParameterSet1;
 if (DeviceWhiteParameterSet2.Length != 0)
 ret += "|" + DeviceWhiteParameterSet2;

 return ret;
}



insertWhite.Parameters.AddWithValue("@Length", length ?? (object)DBNull.Value);

I need this for a database entry. ? operator.

Answer 1

Try this

private double? _Width;
public double? WidthRound    
{
    get => _Width;
    set
    {
        if (value != null) _Width = Math.Round(value.Value, 2);
    }
}