Implement analyzer/fixer: remove unnecessary call

src/Analyzers/Core/Analyzers/EnforceOnBuildValues.cs

@@ -73,6 +73,7 @@ internal static class EnforceOnBuildValues
     public const EnforceOnBuild ConvertTypeOfToNameOf = /*IDE0082*/ EnforceOnBuild.Recommended;
     public const EnforceOnBuild UseNotPattern = /*IDE0083*/ EnforceOnBuild.Recommended;
     public const EnforceOnBuild UseIsNotExpression = /*IDE0084*/ EnforceOnBuild.Recommended;
+    public const EnforceOnBuild RemoveUnnecessaryCall = /*IDE0085*/ EnforceOnBuild.Recommended;
     public const EnforceOnBuild UseImplicitObjectCreation = /*IDE0090*/ EnforceOnBuild.Recommended;
     public const EnforceOnBuild RemoveRedundantEquality = /*IDE0100*/ EnforceOnBuild.Recommended;
     public const EnforceOnBuild RemoveUnnecessaryDiscardDesignation = /*IDE0110*/ EnforceOnBuild.Recommended;

src/Analyzers/Core/Analyzers/IDEDiagnosticIds.cs

@@ -146,6 +146,8 @@ internal static class IDEDiagnosticIds
     public const string UseNotPatternDiagnosticId = "IDE0083";
     public const string UseIsNotExpressionDiagnosticId = "IDE0084";
 
+    public const string RemoveUnnecessaryCallDiagnosticId = "IDE0085";
+
     public const string UseImplicitObjectCreationDiagnosticId = "IDE0090";
 
     public const string RemoveRedundantEqualityDiagnosticId = "IDE0100";

src/Analyzers/Core/CodeFixes/PredefinedCodeFixProviderNames.cs

@@ -102,6 +102,7 @@ internal static class PredefinedCodeFixProviderNames
     public const string RemoveSharedFromModuleMembers = nameof(RemoveSharedFromModuleMembers);
     public const string RemoveUnnecessaryAttributeSuppressions = nameof(RemoveUnnecessaryAttributeSuppressions);
     public const string RemoveUnnecessaryByVal = nameof(RemoveUnnecessaryByVal);
+    public const string RemoveUnnecessaryCall = nameof(RemoveUnnecessaryCall);
     public const string RemoveUnnecessaryCast = nameof(RemoveUnnecessaryCast);
     public const string RemoveUnnecessaryDiscardDesignation = nameof(RemoveUnnecessaryDiscardDesignation);
     public const string RemoveUnnecessaryImports = nameof(RemoveUnnecessaryImports);

src/Analyzers/VisualBasic/Analyzers/RemoveUnnecessaryCall/VisualBasicRemoveUnnecessaryCallDiagnosticAnalyzer.vb

@@ -0,0 +1,99 @@
+' Licensed to the .NET Foundation under one or more agreements.
+' The .NET Foundation licenses this file to you under the MIT license.
+' See the LICENSE file in the project root for more information.
+
+Imports Microsoft.CodeAnalysis.CodeStyle
+Imports Microsoft.CodeAnalysis.Diagnostics
+Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
+
+Namespace Microsoft.CodeAnalysis.VisualBasic.RemoveUnnecessaryCall
+    <DiagnosticAnalyzer(LanguageNames.VisualBasic)>
+    Friend NotInheritable Class VisualBasicRemoveUnnecessaryCallDiagnosticAnalyzer
+        Inherits AbstractBuiltInUnnecessaryCodeStyleDiagnosticAnalyzer
+
+        Public Sub New()
+            MyBase.New(
+                diagnosticId:=IDEDiagnosticIds.RemoveUnnecessaryCallDiagnosticId,
+                enforceOnBuild:=EnforceOnBuildValues.RemoveUnnecessaryCall,
+                [option]:=Nothing,
+                fadingOption:=Nothing,
+                title:=New LocalizableResourceString(NameOf(VisualBasicAnalyzersResources.Remove_Call), VisualBasicAnalyzersResources.ResourceManager, GetType(VisualBasicAnalyzersResources)))
+        End Sub
+
+        Protected Overrides Sub InitializeWorker(context As AnalysisContext)
+            context.RegisterSyntaxNodeAction(
+                Sub(syntaxContext As SyntaxNodeAnalysisContext)
+                    If ShouldSkipAnalysis(syntaxContext, notification:=Nothing) Then
+                        Return
+                    End If
+
+                    Dim callSyntax = DirectCast(syntaxContext.Node, CallStatementSyntax)
+                    Dim root = callSyntax.Invocation
+                    Dim rootAsInvocation = TryCast(root, InvocationExpressionSyntax)
+                    Dim rootAsMemberAccess As MemberAccessExpressionSyntax
+                    Dim rootAsConditionalAccess As ConditionalAccessExpressionSyntax
+                    If rootAsInvocation IsNot Nothing Then
+                        root = rootAsInvocation.Expression
+                    Else
+                        rootAsMemberAccess = TryCast(root, MemberAccessExpressionSyntax)
+                        If rootAsmemberAccess IsNot Nothing Then
+                            root = rootAsMemberAccess.Expression
+                        Else
+                            rootAsConditionalAccess = TryCast(root, ConditionalAccessExpressionSyntax)
+                            If rootAsConditionalAccess IsNot Nothing Then
+                                root = rootAsConditionalAccess.Expression
+                            Else
+                                Debug.Fail(
+                                    "Invocation expression node (type: " & root.GetTypeDisplayName() & ") is not " &
+                                    NameOf(InvocationExpressionSyntax) & ", " &
+                                    NameOf(MemberAccessExpressionSyntax) & ", or " &
+                                    NameOf(ConditionalAccessExpressionSyntax) & "."
+                                )
+                            End If
+                        End If
+                    End If
+                    While True
+                        rootAsMemberAccess = TryCast(root, MemberAccessExpressionSyntax)
+                        rootAsInvocation = TryCast(root, InvocationExpressionSyntax)
+                        rootAsConditionalAccess = TryCast(root, ConditionalAccessExpressionSyntax)
+                        If rootAsMemberAccess Is Nothing AndAlso
+                            rootAsInvocation Is Nothing AndAlso
+                            rootAsConditionalAccess Is Nothing Then
+                            Exit While
+                        End If
+                        root = If(
+                            rootAsMemberAccess?.Expression,
+                            If(
+                                rootAsInvocation?.Expression,
+                                rootAsConditionalAccess?.Expression
+                            )
+                        )
+                    End While
+
+                    ' Refer to ParseAssignmentOrInvocationStatement() calls in src\Compilers\VisualBasic\Portable\Parser\Parser.vb
+                    ' Adopt syntax kind types that wrap them.
+                    If Not root.IsKind(
+                        SyntaxKind.IdentifierName, ' Appended
+                        SyntaxKind.MyBaseExpression,
+                        SyntaxKind.MyClassExpression,
+                        SyntaxKind.MeExpression,
+                        SyntaxKind.GlobalName,
+                        SyntaxKind.PredefinedType,
+                        SyntaxKind.PredefinedCastExpression,
+                        SyntaxKind.DirectCastExpression,
+                        SyntaxKind.TryCastExpression,
+                        SyntaxKind.CTypeExpression,
+                        SyntaxKind.GetTypeExpression,
+                        SyntaxKind.GetXmlNamespaceExpression
+                    ) Then
+                        Return
+                    End If
+                    syntaxContext.ReportDiagnostic(Diagnostic.Create(Descriptor, callSyntax.CallKeyword.GetLocation(), additionalLocations:={callSyntax.GetLocation()}))
+                End Sub, SyntaxKind.CallStatement)
+        End Sub
+
+        Public Overrides Function GetAnalyzerCategory() As DiagnosticAnalyzerCategory
+            Return DiagnosticAnalyzerCategory.SemanticSpanAnalysis
+        End Function
+    End Class
+End Namespace

src/Analyzers/VisualBasic/Analyzers/VisualBasicAnalyzers.projitems

@@ -31,6 +31,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)QualifyMemberAccess\VisualBasicQualifyMemberAccessDiagnosticAnalyzer.vb" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveRedundantEquality\VisualBasicRemoveRedundantEqualityDiagnosticAnalyzer.vb" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessaryByVal\VisualBasicRemoveUnnecessaryByValDiagnosticAnalyzer.vb" />
+    <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessaryCall\VisualBasicRemoveUnnecessaryCallDiagnosticAnalyzer.vb" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessaryCast\VisualBasicRemoveUnnecessaryCastDiagnosticAnalyzer.vb" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessarySuppressions\VisualBasicRemoveUnnecessaryPragmaSuppressionsDiagnosticAnalyzer.vb" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessarySuppressions\VisualBasicRemoveUnnecessaryAttributeSuppressionsDiagnosticAnalyzer.vb" />
@@ -67,4 +68,7 @@
   <ItemGroup Condition="'$(DefaultLanguageSourceExtension)' != '' AND '$(BuildingInsideVisualStudio)' != 'true'">
     <ExpectedCompile Include="$(MSBuildThisFileDirectory)**\*$(DefaultLanguageSourceExtension)" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="$(MSBuildThisFileDirectory)RemoveUnnecessaryCall\" />
+  </ItemGroup>
 </Project>

src/Analyzers/VisualBasic/Analyzers/VisualBasicAnalyzersResources.resx

@@ -143,4 +143,8 @@
   <data name="Object_creation_can_be_simplified" xml:space="preserve">
     <value>Object creation can be simplified</value>
   </data>
+  <data name="Remove_Call" xml:space="preserve">
+    <value>'Call' keyword is unnecessary here and can be removed.</value>
+    <comment>{locked: Call}This is a Visual Basic keyword and should not be localized or have its casing changed</comment>
+  </data>
 </root>