Code inspection: Local function return value is never used

This inspection reports a local function whose return value is ignored at every call site. In that case, the function probably should not return anything.

Example

void M()
{
    int UnusedReturn() => 5;
    UnusedReturn();
}
            

void M()
{
    void UnusedReturn()
    {
        _ = 5;
    }
    UnusedReturn();
}
            

Quick-fix

The quick-fix changes the return type of the local function to void.

13 April 2026