Wrong usage of MVC #helper? - asp.net-mvc-5

Question

I made a helper which is meant to help me debug my app.
It firsts display a header.
Then it tries to run a block of code which returns a fews arguments (array of objects).
Those arguments are used in a string format which is displayed when the block ran fine.
If the block caused an exception, the exception gets displayed.
The problem is, nothing gets displayed at all when I call the helper (I'm very new to that feature).
What's wrong?
#{
Layout = "~/Views/Shared/_Layout.cshtml";
}
#using MygLogWeb.Classes.Fox
<span>test</span>
#helper TryMethod(
string header
, Func<object[]> act
, string successFormat
)
{
#Html.Raw(String.Format(
#"<h2>{0}</h2>"
, HttpUtility.HtmlEncode(header)
));
try
{
var args = act();
if (successFormat == null)
{
#Html.Raw(#"<span class='Success'>OK</span>");
}
else
{
#Html.Raw(String.Format(
#"<span class='Success'>{0}</span>"
, HttpUtility.HtmlEncode(String.Format(
successFormat
, args
))
));
}
}
catch (Exception exe)
{
#Html.Raw(String.Format(
#"<span class='Error'>{0}</span>"
, HttpUtility.HtmlEncode(exe.Message)
));
}
}
<span>test</span>
#{
TryMethod(
"Cust.Columns"
, () => {
return new object[]
{
Cust.Columns.Count
};
}
, "Count: {0}"
);
}
<span>test</span>

Answer 1

The problem is not with the helper method itself but with the execution.
When you execute like this:
#{
TryMethod(...);
}
the code is executed but it's a code block but not written to output.
Use this syntax instead:
#(TryMethod(...))
this should work.