Question

try 
{ 
 if (!File.Exists("File.Ext")) 
    throw new FileNotFoundException(); 

} 
catch(FileNotFoundException e) 
{ 
   // your message here. 
} 

while writing this post i found the code above , thinking there must be a way doing it in one block
i am trying to check for erros reading bmp with

Bitmap b2;
b2 = new Bitmap("g:\\btmp1.bmp");

so if theres a problem assigning the file to “b2” it will give an error

string notExst = "";
Bitmap b2;
try
{
    b2 = new Bitmap("g:\\ba.bmp");
}
catch (FileNotFoundException e)
{
    throw e.Tostring(); \\ would it be ok to 
 \\ msgbox.show(e.Tostring()) insted of throw ?

}

i guess i made a syntax error in my Try Catch, what is the right way?
thanks.

After Edit
Joey, i dont understand your answer i want to be informed and break out of method accordingly
instead of crush

finally

public bool TryGetBitMap(string FilePath)
{
    string NotExstMsg = "The file: " + FilePath + "Could Not Be Found!";
    bool exst = false;
    if (!File.Exists(FilePath))
         MessageBox.Show(NotExstMsg);
    else exst = true;
    return exst;
}

private void ButScreenCupt_Click(object sender, EventArgs e)
{

    string FilePath1 = "g:\\a.bmp";
    string FilePath2 = "g:\\b.bmp";
    Bitmap b1, b2;
    bool isSuccess1 = TryGetBitMap(FilePath1);
    bool isSuccess2 = TryGetBitMap(FilePath2);
    if (isSuccess1 && isSuccess2)
    {
        b1 = new Bitmap(FilePath1);
        pictureBox1.Image = b1;
        b2 = new Bitmap(FilePath2);
        pictureBox2.Image = b2;
        dd = ComparingImages.Compare(b1, b2);

        MessageBox.Show(dd.ToString());
    }
}

Answer 1

You could build your own method using a TryGet pattern.

bool isSuccess = TryGetBitMap("g:\\ba.bmp",b2);