C# Error CS8150 – By-value returns may only be used in methods that return by value

C# Error

CS8150 – By-value returns may only be used in methods that return by value

Reason for the Error & Solution

By-value returns may only be used in methods that return by value

Example

The following sample generates CS8150:

// CS8150.cs (6,9)

class C
{
    ref int M()
    {
        return new();
    }
}

To correct this error

To return by value, refactor the method from being by reference. For example:

// CS8150.cs (6,9)

class C
{
    int M()
    {
        return new();
    }
}