Almost, you can't declare a generic local lambda. public void Test() { // Doesn't work Func<A, string> lam = (A a) => a.ToString();

Almost, you can't declare a generic local lambda. public void Test() { // Doesn't work Func<A, string> lam = (A a) => a.ToString(); // Works string LocalFunc<A>(A a) => a.ToString(); } Also I think if the local function doesn't close over any variables in the containing method then there's no additional memory allocation, whereas the lambda itself must be allocated.