If i have:

public static Func<SomeType, bool> GetQuery() {
 return a => a.Foo=="Bar";
}

and a generic version

public static Func<T, bool> GetQuery<T>() {
 return (Func<T,bool>)GetQuery();
}

how can I do the case? The only way I have found so far is to try and combine it with a mock function:

Func<T, bool> q=a => true;
return (Func<T, bool>)Delegate.Combine(GetQuery(), q);

I know how to do that with Expression.Lambda, but I need to work with plain functions, not expression trees