Is there an equivalent of SQL NULLIF function in c#?

Question

Is there an equivalent of SQL NULLIF function built-in within c#?

Example of what it could look like :

double? result
double denominator = 0;
double Numerator = 100;
result = Numerator / NullIf(denominator, 0);
result = Numerator / denominator.NullIf(0);
result = Numerator / Object.NullIf(denominator, 0);

Answer 1

No, there is no language feature for this at present.

You can easily get the same result, either with a ternary if:

result = Numerator / (denominator == 0 ? (double?)null : denomiantor);

Or even wrapping it as a generic function, so something like:

Nullable<T> NullIf<T>(T left, T right)
{
    return left == right ? (T?)null : left;
}

which could then be called like:

result = Numerator / NullIf(denominator, 0);

Answer 2

Accepted answer give me:

Operator '==' cannot be applied to operands of type 'T' and 'T'

My working example of NULLIF:

public static T? NullIf<T>(T left, T right) where T : struct
{
    return EqualityComparer<T>.Default.Equals(left, right) ? (T?)null : left;
}