Fix warnings

Author: Youssef1313

src/Compilers/CSharp/csc/Program.cs

@@ -11,7 +11,7 @@
 
 namespace Microsoft.CodeAnalysis.CSharp.CommandLine
 {
-    public class Program
+    public static class Program
     {
         public static int Main(string[] args)
         {

src/Compilers/Test/Core/Assert/DiffUtil.cs

@@ -11,7 +11,7 @@
 
 namespace Microsoft.CodeAnalysis.Test.Utilities
 {
-    public class DiffUtil
+    public static class DiffUtil
     {
         private enum EditKind
         {

src/Compilers/Test/Core/Platform/Custom/MetadataSignatureHelper.cs

@@ -15,7 +15,7 @@
 
 namespace Roslyn.Test.Utilities
 {
-    public class MetadataSignatureHelper
+    public static class MetadataSignatureHelper
     {
         #region Helpers
         private const BindingFlags BINDING_FLAGS =

src/Compilers/Test/Core/Win32Res.cs

@@ -15,7 +15,7 @@
 
 namespace Microsoft.CodeAnalysis.Test.Utilities
 {
-    public class Win32Res
+    public static class Win32Res
     {
         [DllImport("kernel32.dll", SetLastError = true)]
         private static extern IntPtr FindResource(IntPtr hModule, string lpName, string lpType);

src/Compilers/VisualBasic/Portable/Scanner/CharacterInfo.vb

@@ -16,7 +16,9 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
     ''' <summary>
     ''' Provides members for determining Syntax facts about characters and Unicode conversions.
     ''' </summary>
+#Disable Warning CA1052 ' Static holder types should be Static or NotInheritable - Public API
     Partial Public Class SyntaxFacts
+#Enable Warning CA1052 ' Static holder types should be Static or NotInheritable
 
         '/*****************************************************************************/
         '// MakeFullWidth - Converts a half-width to full-width character

src/Compilers/VisualBasic/Portable/Syntax/SyntaxNodeRemover.vb

@@ -12,7 +12,9 @@ Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
 
 Namespace Microsoft.CodeAnalysis.VisualBasic.Syntax
 
+#Disable Warning CA1052 ' Static holder types should be Static or NotInheritable - Public API
     Public Class SyntaxNodeRemover
+#Enable Warning CA1052 ' Static holder types should be Static or NotInheritable
         Friend Shared Function RemoveNodes(Of TRoot As SyntaxNode)(root As TRoot, nodes As IEnumerable(Of SyntaxNode), options As SyntaxRemoveOptions) As TRoot
             Dim nodesToRemove As SyntaxNode() = nodes.ToArray()
 

src/Compilers/VisualBasic/vbc/Program.cs

@@ -11,7 +11,7 @@
 
 namespace Microsoft.CodeAnalysis.VisualBasic.CommandLine
 {
-    public class Program
+    public static class Program
     {
         public static int Main(string[] args)
         {

src/Test/Perf/StackDepthTest/Program.cs

@@ -13,7 +13,7 @@
 
 namespace OverflowSensitivity
 {
-    public class Program
+    public static class Program
     {
         [DllImport("kernel32.dll")]
         private static extern ErrorModes SetErrorMode(ErrorModes uMode);

src/Test/Perf/Utilities/TraceManager.cs

@@ -13,7 +13,7 @@
 
 namespace Roslyn.Test.Performance.Utilities
 {
-    public class TraceManagerFactory
+    public static class TraceManagerFactory
     {
         public static ITraceManager GetBestTraceManager()
         {

src/Test/Perf/tests/helloworld/HelloWorld.cs

@@ -2,9 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable disable
-
-public class Hello1
+public static class Hello1
 {
     public static void Main()
     {