Using lambda function in a foreach over controls

Question

I would like to translate this:

foreach(Control c in Controls)
{
    if(c is TextBox)
    {
        // ...
    }
}

Into:

foreach(Control c => (c is TextBox) in Controls)
{
    // ...
}

How can it be done using the lambda function specifically?

Answer 1

Use OfType:

foreach (TextBox c in Controls.OfType<TextBox>())
{

}

It filters the elements of an IEnumerable based on a specified type.

Also don't forget to add LINQ to your using directives first:

using System.Linq;

Answer 2

Reference Linq:

using System.Linq;

And use this:

foreach (var control in Controls.Cast<Control>().Where(c => c is TextBox))
{
    // ...
}

Answer 3

You are looking for something like this:

foreach(TextBox ctrlTxtBox in Controls.OfType<TextBox>())
{
   // Got it code here
}

OfType Filters the elements of an IEnumerable based on a specified type.