问如何停止当前方法调用的执行

EN

// In order to clone your variable, you may need to inherit from 
// ICloneable and implement the Clone function.
bool MyFunction(ICloneable c)
{
    // 1. Create a copy of your variable
    ICloneable clone = c.Clone();

    // 2. Do whatever you want in here
    ...

    // 3. Now check your condition
    if (condition)
    {
        // Copy all the attributes back across to c from your clone
        // (You'll have to write the ResetAttributes method yourself)
        c.ResetAttributes(clone);

        // Put a message box up
        MessageBox.Show("This failed!");

        // Now let the caller know that the function failed
        return false;
    }
    else
    {
        // Let the caller know that the function succeeded
        return true;
    }
}