Examples of errors detected by the V3029 diagnostic

V3029. The conditional expressions of the 'if' statements situated alongside each other are identical.

.NET Compiler Platform ("Roslyn")

V3029 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 223, 228. EditAndContinueTestHelpers.cs 223

internal void VerifySemantics(....)
{
  ....
  if (additionalOldSources != null)
  {
    oldTrees = oldTrees.Concat(
      additionalOldSources.Select(s => ParseText(s)));
  }

  if (additionalOldSources != null)
  {
    newTrees = newTrees.Concat(
      additionalNewSources.Select(s => ParseText(s)));
  }
  ....
}

Samples by the Infragistics Company

V3029 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 338, 339. Program.cs 42

public void OnPropertyChanged(PropertyChangedEventArgs ea) {
  ....
  var index = this.SelectedBrushCollectionIndex;
  ....
  if (index >= 0) {
    DebugManager.
      LogData(this.BrushCollectionList[index].ToText());
  }
  if (index >= 0) {
    this.SelectedBrushCollectionIndex = index;
  }
  ....
}

AWS SDK for .NET

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 91, 95. AWSSDK.AppSync.Net45 CreateApiKeyResponseUnmarshaller.cs 91

public override AmazonServiceException UnmarshallException(....)
{
  ....
  if (errorResponse.Code != null &&
    errorResponse.Code.Equals("LimitExceededException"))
  {
    return new LimitExceededException(errorResponse.Message,
      innerException, errorResponse.Type, errorResponse.Code,
      errorResponse.RequestId, statusCode);
  }

  if (errorResponse.Code != null &&
    errorResponse.Code.Equals("LimitExceededException"))
  {
    return new LimitExceededException(errorResponse.Message,
      innerException, errorResponse.Type, errorResponse.Code,
      errorResponse.RequestId, statusCode);
  }
  ....
}

Similar errors can be found in some other places:

• V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 75, 79. AWSSDK.CloudDirectory.Net45 CreateSchemaResponseUnmarshaller.cs 75
• V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 105, 109. AWSSDK.CloudDirectory.Net45 GetSchemaAsJsonResponseUnmarshaller.cs 105
• V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 201, 205. AWSSDK.CodeCommit.Net45 PostCommentForPullRequestResponseUnmarshaller.cs 201
• And 7 additional diagnostic messages.

Emby

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 142, 152. LocalImageProvider.cs 142

private void PopulateImages(....)
{
  ....
  // Logo
  if (!isEpisode && !isSong && !isPerson)
  {
    added = AddImage(....);
    if (!added)
    {
      added = AddImage(....);
    }
  }
  // Art
  if (!isEpisode && !isSong && !isPerson)
  {
    AddImage(....);
  }
  ....
}

Squidex

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 50, 57. AssetFolderDto.cs 50

private static AssetFolderDto CreateLinks(AssetFolderDto response,
                                          Resources resources)
{
  var values = new { app = resources.App, id = response.Id };

  if (resources.CanUpdateAsset)
  {
    response.AddPutLink("update", resources.Url<AssetFoldersController>(x =>
                                  nameof(x.PutAssetFolder), values));

    response.AddPutLink("move", resources.Url<AssetFoldersController>(x =>
                                nameof(x.PutAssetFolderParent), values));
  }

  if (resources.CanUpdateAsset)
  {
    response.AddDeleteLink("delete", resources.Url<AssetFoldersController>(x =>
                                     nameof(x.DeleteAssetFolder), values));
  }

  return response;
}

Unity C# reference source code

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 930, 933. ZoomableArea.cs 930

public void SetScaleFocused(Vector2 focalPoint,
                            Vector2 newScale,
                            bool lockHorizontal,
                            bool lockVertical)
{
  if (uniformScale)
    lockHorizontal = lockVertical = false;
  else
  {
    if (hZoomLockedByDefault)
      lockHorizontal = !lockHorizontal;

    if (hZoomLockedByDefault)
      lockVertical = !lockVertical;
  }
....
}

Unity C# reference source code

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 722, 728. BuiltinTools.cs 722

static Vector3 ResizeHandlesGUI(....)
{
  ....
  Vector3 scale = Vector3.one;
  ....
  if (uniformScaling)                                 // <=
  {
    float refScale = (xHandle == 1 ? scale.y : scale.x);
    scale = Vector3.one * refScale;
  }

  if (uniformScaling)                                 // <=
  {
    float refScale = (xHandle == 1 ? scale.y : scale.x);
    scale = Vector3.one * refScale;
  }
  ....
}

BTCPay Server

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 59, 64. BTCpayMiddleware.cs 59

public async Task Invoke(HttpContext httpContext)
{
    CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
    CultureInfo.CurrentUICulture = CultureInfo.InvariantCulture;
    try
    {
        var bitpayAuth = GetBitpayAuth(httpContext, out bool isBitpayAuth);
        var isBitpayAPI = IsBitpayAPI(httpContext, isBitpayAuth);
        if (isBitpayAPI && httpContext.Request.Method == "OPTIONS")
        {
            httpContext.Response.StatusCode = 200;
            httpContext.Response.SetHeader("Access-Control-Allow-Origin", "*");
            if (httpContext.Request.Headers.ContainsKey("...."))
            {
                httpContext.Response.SetHeader("Access-Control-Allow-Headers",
                    httpContext.Request.Headers["...."].FirstOrDefault());
            }
            return; // We bypass MVC completely
        }
        httpContext.SetIsBitpayAPI(isBitpayAPI);
        if (isBitpayAPI) // <=
        {
            httpContext.Response.SetHeader("Access-Control-Allow-Origin", "*");
            httpContext.SetBitpayAuth(bitpayAuth);
        }
        if (isBitpayAPI) // <=
        {
            await _Next(httpContext);
            return;
        }

AWS SDK for .NET

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 41, 43. GetObjectTorrentRequestMarshaller.cs 41

public IRequest Marshall(GetObjectTorrentRequest getObjectTorrentRequest)
{
  ....

  if (getObjectTorrentRequest.IsSetRequestPayer())
    request.Headers
           .Add(S3Constants.AmzHeaderRequestPayer,
                S3Transforms.ToStringValue(getObjectTorrentRequest.RequestPayer
                                                                  .ToString()));

  if (getObjectTorrentRequest.IsSetRequestPayer())
    request.Headers
           .Add(S3Constants.AmzHeaderRequestPayer,
                S3Transforms.ToStringValue(getObjectTorrentRequest.RequestPayer
                                                                  .ToString()));
  ....
}

ScreenToGif

V3029 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 1264, 1267. EncodingManager.cs 1264

....
using (var process = new Process())
{
  process.StartInfo = procStartInfo;
  process.Start();

  var message = await process.StandardOutput.ReadToEndAsync();
  var error = await process.StandardError.ReadToEndAsync();

  if (!string.IsNullOrWhiteSpace(message))
      output += message + Environment.NewLine;

  if (!string.IsNullOrWhiteSpace(message))
      output += message + Environment.NewLine;

  process.WaitForExit(1000);
}
....
SetCommand(id, true, command, output);