diff --git a/solution/NPOI.Core.Test.sln b/solution/NPOI.Core.Test.sln
index 9328d5a3b..f7659e966 100644
--- a/solution/NPOI.Core.Test.sln
+++ b/solution/NPOI.Core.Test.sln
@@ -26,7 +26,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "_build", "..\build\_build.c
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "NPOI.Benchmarks", "..\benchmarks\NPOI.Benchmarks\NPOI.Benchmarks.csproj", "{3DA1149D-46F8-4181-9976-E002BF2BFB76}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "NPOI.Pack", "NPOI.Pack.csproj", "{6D7A6E15-C914-4FCA-B8E4-FF5C7437C2E0}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NPOI.Pack", "NPOI.Pack.csproj", "{6D7A6E15-C914-4FCA-B8E4-FF5C7437C2E0}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -62,10 +62,6 @@ Global
 		{DA2CA3BD-1CAC-470C-9FA2-611A5768A76A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DA2CA3BD-1CAC-470C-9FA2-611A5768A76A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{DA2CA3BD-1CAC-470C-9FA2-611A5768A76A}.Release|Any CPU.Build.0 = Release|Any CPU
-		{94B18BCF-84E8-401F-BAAB-0496AA136628}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{94B18BCF-84E8-401F-BAAB-0496AA136628}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{94B18BCF-84E8-401F-BAAB-0496AA136628}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{94B18BCF-84E8-401F-BAAB-0496AA136628}.Release|Any CPU.Build.0 = Release|Any CPU
 		{3DA1149D-46F8-4181-9976-E002BF2BFB76}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{3DA1149D-46F8-4181-9976-E002BF2BFB76}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{3DA1149D-46F8-4181-9976-E002BF2BFB76}.Release|Any CPU.ActiveCfg = Release|Any CPU