c# - InvalidOperationException 和 NullReferenceException

Question

当我调试我的应用程序时，我遇到了很多 InvalidOperationException 和 NullReferenceException，如下所示:

A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.InvalidOperationException' occurred in System.Core.dll
A first chance exception of type 'System.NullReferenceException' occurred in XGen.Framework.DLL

它如何使应用程序变慢？

编辑:

找到发生 InvalidOperationException 的地方

public static Value.Locale Get(string value)
    {
        try
        { return _Items.First(itm => itm.ID.ToUpper() == value.ToUpper() || itm.Name.ToUpper() == value.ToUpper()); }
        catch (Exception)
        { return new XGen.Framework.Value.Locale(); }
    }

翻译文本:序列不包含匹配的元素

我应该检查 _Items.Count > 0 吗？

Answer 1

它不可能使您的应用程序更快，所以是的，它会使它变慢，但当然“更慢”是相对的。我更关心的是这些异常是由您的应用程序中的逻辑错误引起的，而不是它运行的速度。