CA1018: Mark attributes with AttributeUsageAttribute

.editorconfig

@@ -230,6 +230,9 @@ dotnet_diagnostic.CA1822.severity = warning # not default, increased severity to
 # CA1816: Dispose methods should call SuppressFinalize
 dotnet_diagnostic.CA1816.severity = warning # not default, increased severity to ensure it is applied
 
+# CA1018: Mark attributes with AttributeUsageAttribute
+dotnet_diagnostic.CA1018.severity = warning # not default, increased severity to ensure it is applied
+
 #### C# Coding Conventions ####
 
 # var preferences

src/Microsoft.TestPlatform.CommunicationUtilities/Messages/ProtocolVersionAttribute.cs

@@ -7,6 +7,7 @@
 namespace Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.ObjectModel;
 
 [Conditional("DEBUG")]
+[AttributeUsage(AttributeTargets.Field)]
 internal class ProtocolVersionAttribute : Attribute
 {
     public ProtocolVersionAttribute(int added, Type payloadType)

src/Microsoft.TestPlatform.ObjectModel/CodeCoverage/TestSDKAutoGeneratedCode.cs

@@ -8,6 +8,7 @@ namespace Microsoft.VisualStudio.TestPlatform;
 /// <summary>
 /// Only to be used to Test platform, to exclude auto generated code from CodeCoverage
 /// </summary>
+[AttributeUsage(AttributeTargets.All)]
 public class TestSDKAutoGeneratedCode : Attribute
 {
 }

src/Microsoft.TestPlatform.ObjectModel/DataCollector/Attributes/DataCollectorAttachmentProcessor.cs

@@ -8,6 +8,7 @@ namespace Microsoft.VisualStudio.TestPlatform.ObjectModel.DataCollection;
 /// <summary>
 /// Registers an attachment processor for a data collector.
 /// </summary>
+[AttributeUsage(AttributeTargets.Class)]
 public class DataCollectorAttachmentProcessorAttribute : Attribute
 {
     /// <summary>

src/Microsoft.TestPlatform.ObjectModel/DataCollector/Attributes/DataCollectorFriendlyNameAttribute.cs

@@ -8,6 +8,7 @@ namespace Microsoft.VisualStudio.TestPlatform.ObjectModel.DataCollection;
 /// <summary>
 /// Provides a friendly name for the data collector.
 /// </summary>
+[AttributeUsage(AttributeTargets.Class)]
 public class DataCollectorFriendlyNameAttribute : Attribute
 {
     /// <summary>

src/Microsoft.TestPlatform.ObjectModel/DataCollector/Attributes/DataCollectorTypeUriAttribute.cs

@@ -9,6 +9,7 @@ namespace Microsoft.VisualStudio.TestPlatform.ObjectModel.DataCollection;
 /// Provides unique identification of a data collector in the form of a URI.
 /// Recommended format: 'datacollector://Company/Product/Version'
 /// </summary>
+[AttributeUsage(AttributeTargets.Class)]
 public class DataCollectorTypeUriAttribute : Attribute
 {
     /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/VersionAttribute.cs

@@ -7,6 +7,7 @@
 namespace Microsoft.TestPlatform.PlatformAbstractions;
 
 [Conditional("DEBUG")]
+[AttributeUsage(AttributeTargets.Method)]
 internal class VersionAttribute : Attribute
 {
     public string? Description { get; set; }