Enable CA1052: Static holder should be static (#357)

Author: twsouthwick

DocumentFormat.OpenXml.Tests/ConformanceTest/CommentEx/Commons.cs

@@ -12,7 +12,7 @@ namespace DocumentFormat.OpenXml.Tests.CommentEx
     /// <summary>
     /// Comment and CommentEx, Get support class.
     /// </summary>
-    public class Commons
+    public static class Commons
     {
         /// <summary>
         /// Comment object, Get support mothod.

DocumentFormat.OpenXml.Tests/ConformanceTest/ContentControl/DeleteElement.cs

@@ -12,7 +12,7 @@ namespace DocumentFormat.OpenXml.Tests.ContentControl
     /// <summary>
     /// Delete all of the std element
     /// </summary>
-    public class DeleteElement
+    public static class DeleteElement
     {
         /// <summary>
         /// Delete all of the std element

DocumentFormat.OpenXml.Tests/ConformanceTest/ContentControl/EditElement.cs

@@ -11,7 +11,7 @@
 
 namespace DocumentFormat.OpenXml.Tests.ContentControl
 {
-    public class EditElement
+    public static class EditElement
     {
         public static void EditContentControlElements(string filePath, VerifiableLog log)
         {

DocumentFormat.OpenXml.Tests/ConformanceTest/ContentControl/VerifyDeletedElement.cs

@@ -11,7 +11,7 @@ namespace DocumentFormat.OpenXml.Tests.ContentControl
     /// <summary>
     /// Verify that the sdt element has been deleted
     /// </summary>
-    public class VerifyDeletedElement
+    public static class VerifyDeletedElement
     {
         /// <summary>
         /// Verify that the sdt element has been deleted

DocumentFormat.OpenXml.Tests/ConformanceTest/ContentControl/VerifyElement.cs

@@ -14,7 +14,7 @@ namespace DocumentFormat.OpenXml.Tests.ContentControl
     /// <summary>
     /// To check whether a document has been changed correctly
     /// </summary>
-    public class VerifyElement
+    public static class VerifyElement
     {
         /// <summary>
         /// To check whether a document has been changed correctly

DocumentFormat.OpenXml.Tests/TestUtil2.cs

@@ -7,7 +7,7 @@
 
 namespace OxTest
 {
-    public class TestUtil
+    public static class TestUtil
     {
         public static string RootFolder => Path.GetDirectoryName(typeof(TestUtil).GetTypeInfo().Assembly.Location);
 

Open-XML-SDK.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.27130.2003
+VisualStudioVersion = 15.0.27130.2010
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DocumentFormat.OpenXml", "DocumentFormat.OpenXml\DocumentFormat.OpenXml.csproj", "{16941A4A-F8DE-4C8D-BA2B-3C0774848D4B}"
 EndProject

rules.ruleset

@@ -197,7 +197,6 @@
     <Rule Id="CA1000" Action="None" />
     <Rule Id="CA1018" Action="None" />
     <Rule Id="CA1040" Action="None" />
-    <Rule Id="CA1052" Action="None" />
     <Rule Id="CA1054" Action="None" />
     <Rule Id="CA1056" Action="None" />
     <Rule Id="CA1065" Action="None" />