c# error CS0200

/* Sedan.cs(41,5): error CS0200: Property or indexer<br /> ‘Sedan.Speed’ cannot be assigned to — it is read only */</p> <p>public void SpeedUp()<br /> {<br /> Speed += 5;<br /> } //Trying to change/set value</p> <p>public double Speed<br /> { get; } //Property speed doesn’t have setter</p> <p>public double Speed<br /> { get; set; } //Fixes error<br />