C#

mabrahao wrote:

String.Format is uppercase in the S

string p = TextBox.Text.Trim();
p = string.Format("{0} {1} {2}", p.Substring(0, 2), p.Substring(2, 3), p.Substring(5, 3));
// If you are using Windows Forms, this will show the output. You will do it differently if you are using ASP.NET.
MessageBox.Show(p);

• Your sample output contains spaces, but your format strong contains commas.
• string.Format returns the modified string, yet you were not assigning the return value to anything.
• string.Substring has 2 parameters. The second prameter is the string length, not a second index. So where you used 4 and 7, you should have used 3.

int val;
bool OK=int.TryParse(myTextBox.Text, out val);

string s=string.Format("{0:## ### ###.##}", val);

string.Format("{0:n0}", val)

var provider = (CultureInfo) CultureInfo.CurrentCulture.Clone();
provider.NumberFormat.NumberGroupSeparator = " ";
string.Format(provider, "{0:n0}", val);

public T Foo<T>() where T : new(){
    return new T();
}

	public class Test {
		public Test() {

		}
	}
	public class Bar {
		public static void Test<T>() where T : Test, new() {
			T t = new T();
		}
	}
...
Bar.Test <Test>();