Code Inspection: Explicit delegate creation expression is redundant

Redundant delegate constructor calls may occur, for example, as a result of adding event handlers:

MyHandler += new EventHandler(MyMethod);

Below, the type of a delegate variable ValueChanged can be inferred from its declaration. To make code shorter, JetBrains Rider suggests removing a redundant explicit delegate’s constructor call:

            
internal class EventTest
{
    protected event EventHandler ValueChanged;

    protected EventTest()
    {
        ValueChanged += new EventHandler(HandleValueChanged);
    }

    private void HandleValueChanged(object sender, EventArgs e)
    {
        // ...
    }

    protected virtual void OnMyValueChanged()
    {
        ValueChanged?.Invoke(this, EventArgs.Empty);
    }
}

        

            
internal class EventTest
{
    protected event EventHandler ValueChanged;

    protected EventTest()
    {
        ValueChanged += HandleValueChanged;
    }

    private void HandleValueChanged(object sender, EventArgs e)
    {
        // ...
    }

    protected virtual void OnMyValueChanged()
    {
        ValueChanged?.Invoke(this, EventArgs.Empty);
    }
}

        

Last modified: 07 April 2022