C# property constraints

July 12, 2023

I have a following statement:

public int aValue { get; set; }
public int func() { return someNonConstantValue; }

is there a way to constraint it to the range from -5 to what func() returns?
I could use Math.Clamp but if I define the setter will I also need to provide the getter?

>Solution :

Yes, if you provide a setter you will also need a custom getter. By this should not be a problem:

private int _aValue;
public int aValue
{
   get => _aValue;
   set
   {
     int upperLimit = func();
     if(value < -5 || value > upperLimit )
     {
        throw new ArgumentOutOfRangeException("value", "should be between -5 and " + upperLimit);
     }
     _aValue = value;
   }
}