Question

The question is how to get an object from List having its field value

I have got list called f_objects filled with objects.

private List<F_object> f_objects;

i’ve got also a string with some value :

string name = "something";

F_object got a method returning its field called name:

public string GetName()
{
    return this.name;
}

Is there a built in method for compare objects in list vs this field value ? Or should i make a loop and compare like this:

foreach(F_object ob in f_objects)
{
    if String.Equals(name, ob.GetName())
    F_object found = ob;
} 

Answer 1

There are multiple ways of doing this in linq.
First one is to use .Where. This would suite your needs if there can be more matches

IEnumerable<F_object> result = f_objects.Where(obj=>obj.GetName() == name);

Second option is if you are only concerned about the first hit, even if there could be more than one, in that case use .First

f_object result = f_objects.First(obj=>obj.GetName() == name);

or if zero hits is an accepted situation (non-exceptional)

f_object result = f_objects.FirstOrDefault(Obj=>obj.GetName() == name);

if you should only ever have one hit then use .Single

f_object result = f_objects.Single(obj=>obj.GetName() == name);

or if you can have only one or zero hits then use .SingleOrDefault

f_object result = f_objects.SingleOrDefault(obj=>obj.GetName() == name);