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This signifies that there are multiple response headers (like in redirection).\n+\n+            response.Headers.Clear();\n+            \n+            response.Content.Headers.Clear();        \n+\n+            int responseHeaderLength = responseHeader.Length;\n+\n             // Check if line begins with HTTP/1.1 or HTTP/1.0\n             int prefixLength = s_httpPrefix.Length;\n-            if ((responseHeader[prefixLength] == '1') && (responseHeader[prefixLength + 1] == '.'))\n+            int versionIndex = prefixLength + 2;\n+\n+            if ((versionIndex < responseHeaderLength) && (responseHeader[prefixLength] == '1') && (responseHeader[prefixLength + 1] == '.'))\n             {\n-                if (responseHeader[prefixLength + 2] == '1')\n+                if (responseHeader[versionIndex] == '1')\n                 {\n                     response.Version = new Version(1, 1);\n                 }\n-                else if (responseHeader[prefixLength + 2] == '0')\n+                else if (responseHeader[versionIndex] == '0')\n                 {\n                     response.Version = new Version(1, 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is immutable once constructed, so there shouldn't be any problems here unless we're worried about someone assuming lack of reference equality on Version objects.  @davidsh, any reason WinHttpHandler doesn't/couldn't do 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