The this keyword for lambda

[IgorSivirinov]

Summary

I would like to suggest adding the ability to allow this to be specified as a lambda parameter.
That is, we say that in a given lambda this it is not only. class, but also a parameter. That is, all fields, methods, etc. class and lambda parameter are accessible with this
Example LINQ query:

users.Where(this => Age < 35).ToList();

Usage example with ReactiveUI DataBinding:

this.WhenActivated(this =>
{
    this.Bind(ViewModel, this => TheText, this => TheTextBox.Text)
        .DisposeWith(this);
    this.OneWayBind(ViewModel, this => TheText, this => TheTextBlock.Text)
        .DisposeWith(this);
    this.BindCommand(ViewModel, this => TheTextCommand, this => TheTextButton)
        .DisposeWith(this);
});

Motivation

I would like to reduce the amount of writing the same parameter.

Drawbacks

The main problem is the conflict with the class the lambda is in. I suggest if the variable, method, etc. in the class is called the same as in the lambda parameter object and we need to access the variable from the class, then we use this syntax
this.out

By default, in such a conflict, the variable from the lambda parameter is used.
If we need to get the value of a parameter, we use this

[jnm2]

An alternative approach to reduce writing a parameter that is even shorter: #91

[HaloFour]

Also see #1151 where I think replacing "this" makes more sense.