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copied!<p>You can get the offset of the last MSIL instruction from the Exception using System.Diagnostics.StackTrace:</p> <pre><code>// Using System.Diagnostics static void Main(string[] args) { try { ThrowError(); } catch (Exception e) { StackTrace st = new System.Diagnostics.StackTrace(e); string stackTrace = ""; foreach (StackFrame frame in st.GetFrames()) { stackTrace = "at " + frame.GetMethod().Module.Name + "." + frame.GetMethod().ReflectedType.Name + "." + frame.GetMethod().Name + " (IL offset: 0x" + frame.GetILOffset().ToString("x") + ")\n" + stackTrace; } Console.Write(stackTrace); Console.WriteLine("Message: " + e.Message); } Console.ReadLine(); } static void ThrowError() { DateTime myDateTime = new DateTime(); myDateTime = new DateTime(2000, 5555555, 1); // won't work Console.WriteLine(myDateTime.ToString()); } </code></pre> <p>Output:</p> <blockquote> <p>at ConsoleApplicationN.exe.Program.Main (IL offset: 0x7)<br> at ConsoleApplicationN.exe.Program.ThrowError (IL offset: 0x1b)<br> at mscorlib.dll.DateTime..ctor (IL offset: 0x9)<br> at mscorlib.dll.DateTime.DateToTicks (IL offset: 0x61)<br> Message: Year, Month, and Day parameters describe an un-representable DateTime. </p> </blockquote> <p>You can then use <a href="http://www.red-gate.com/products/reflector/" rel="nofollow noreferrer">Reflector</a> or <a href="http://ilspy.net/" rel="nofollow noreferrer">ILSpy</a> to interpret the offset:</p> <pre><code>.method private hidebysig static void ThrowError() cil managed { .maxstack 4 .locals init ( [0] valuetype [mscorlib]System.DateTime myDateTime) L_0000: nop L_0001: ldloca.s myDateTime L_0003: initobj [mscorlib]System.DateTime L_0009: ldloca.s myDateTime L_000b: ldc.i4 0x7d0 L_0010: ldc.i4 0x54c563 L_0015: ldc.i4.1 L_0016: call instance void [mscorlib]System.DateTime::.ctor(int32, int32, int32) L_001b: nop L_001c: ldloca.s myDateTime L_001e: constrained [mscorlib]System.DateTime L_0024: callvirt instance string [mscorlib]System.Object::ToString() L_0029: call void [mscorlib]System.Console::WriteLine(string) L_002e: nop L_002f: ret } </code></pre> <p>You know that the instruction before 0x1b threw the exception. It's easy to find the C# code for that:</p> <pre><code> myDateTime = new DateTime(2000, 5555555, 1); </code></pre> <p>You could map the IL code to your C# code now, but I think the gain would be too little and the effort too big (though there might be a reflector plugin). You should be fine with the IL offset.</p>

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