c# use of class property as argument in a simpler way

I have a method that works OK to get the index of a list using a class property as argument.

The code:

public static int GetIndex<T, TKey>(this T myTypeClass, Expression<Func<T, TKey>> propertySelector)
{
    var body = (MemberExpression)propertySelector.Body;
    var propertyInfo = (PropertyInfo)body.Member;

    // list where I need to find the index for the property defined in the argument
    List<KeyValuePair<PropertyInfo, int>> indexList = GlobalClassList;

    // simple LINQ line to retrieve the int that corresponds with the 'propertyInfo'
    int i = indexList.FindIndex(p => p.Key.Equals(propertyInfo));
    return i;
}

To call the method:

MyClass myClass = new MyClass();
myClass.GetIndex(c=>c.property)

What I'm trying to do, is to simplify the argument in the method using just the property of the class (c.property) instead having to rely on the use of the Expression<Func<T, TKey>> (c=>c.property). Is this possible?