Flee Exception Handling

Exception handling helps you deal with any unexpected or exceptional situations that occur when a program is running. You can use the try, catch, and finally keywords to try actions that may not succeed, to handle failures, and to clean up resources afterward.

Expressions can fail to compile if the syntax of the text is invalid. An ExpressionCompileExpression will be thrown whenever an expression cannot be compiled.

public static void Example1()
{
    try
    {
        string expression = "2 + 13 -";

        ExpressionContext context = new ExpressionContext();
        IDynamicExpression eDynamic = context.CompileDynamic(expression);

        Object result = eDynamic.Evaluate();
        Console.WriteLine("{0} ({1})", result, result.GetType());
    }
    catch (ExpressionCompileException e)
    {
        if (e.Reason == CompileExceptionReason.SyntaxError)
            Console.WriteLine("Check your expression syntax");
    }
}

Let's execute the above code, and you will see the following output.

Check your expression syntax