diff --git a/Lucene.Net.sln.DotSettings b/Lucene.Net.sln.DotSettings
index 464613e85d..747aae4ad6 100644
--- a/Lucene.Net.sln.DotSettings
+++ b/Lucene.Net.sln.DotSettings
@@ -1,2 +1,3 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=Coord/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Coord/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=LUCENENET/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Lucene.Net.Tests/Index/TestIndexWriterConfig.cs b/src/Lucene.Net.Tests/Index/TestIndexWriterConfig.cs
index d27302ba16..9c5a9f6d4e 100644
--- a/src/Lucene.Net.Tests/Index/TestIndexWriterConfig.cs
+++ b/src/Lucene.Net.Tests/Index/TestIndexWriterConfig.cs
@@ -135,7 +135,7 @@ public virtual void TestSettersChaining()
                     // IndexWriterConfig return type and second with LiveIndexWriterConfig. The ones
                     // from LiveIndexWriterConfig are marked 'synthetic', so just collect them and
                     // assert in the end that we also received them from IWC.
-                    // In C# we do not have them marked synthetic so we look at the declaring type instead.
+                    // LUCENENET: In C# we do not have them marked synthetic so we look at the declaring type instead.
                     if (m.DeclaringType?.Name == "LiveIndexWriterConfig")
                     {
                         liveSetters.Add(m.Name);
diff --git a/src/Lucene.Net.Tests/Index/TestIndexWriterDelete.cs b/src/Lucene.Net.Tests/Index/TestIndexWriterDelete.cs
index f634823722..a64e9af0dc 100644
--- a/src/Lucene.Net.Tests/Index/TestIndexWriterDelete.cs
+++ b/src/Lucene.Net.Tests/Index/TestIndexWriterDelete.cs
@@ -16,6 +16,8 @@
 using System.Threading;
 using JCG = J2N.Collections.Generic;
 using Console = Lucene.Net.Util.SystemConsole;
+// ReSharper disable once RedundantUsingDirective - keep until we have an analyzer to look out for accidental NUnit asserts
+using Assert = Lucene.Net.TestFramework.Assert;
 
 namespace Lucene.Net.Index
 {
diff --git a/src/Lucene.Net.Tests/Index/TestIndexWriterExceptions.cs b/src/Lucene.Net.Tests/Index/TestIndexWriterExceptions.cs
index 2a6412d172..e54ed5c0b6 100644
--- a/src/Lucene.Net.Tests/Index/TestIndexWriterExceptions.cs
+++ b/src/Lucene.Net.Tests/Index/TestIndexWriterExceptions.cs
@@ -12,6 +12,7 @@
 using RandomizedTesting.Generators;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Threading;
 using Assert = Lucene.Net.TestFramework.Assert;
@@ -214,7 +215,7 @@ public override void Run()
                         Console.WriteLine(Thread.CurrentThread.Name + ": TEST: IndexerThread: cycle");
                     }
                     outerInstance.doFail.Value = this.Instance;
-                    string id = "" + r.Next(50);
+                    string id = r.Next(50).ToString(CultureInfo.InvariantCulture); // LUCENENET: using InvariantCulture ToString overload instead of implicit `"" + r.Next(50)`
                     idField.SetStringValue(id);
                     Term idTerm = new Term("id", id);
                     try
@@ -2134,7 +2135,7 @@ public virtual void TestNoLostDeletesOrUpdates()
                 for (int i = 0; i < numDocs; i++)
                 {
                     Document doc = new Document();
-                    doc.Add(new StringField("id", (docBase + i).ToString(), Field.Store.NO));
+                    doc.Add(new StringField("id", (docBase + i).ToString(CultureInfo.InvariantCulture), Field.Store.NO));
                     if (DefaultCodecSupportsDocValues)
                     {
                         doc.Add(new NumericDocValuesField("f", 1L));
@@ -2172,20 +2173,20 @@ public virtual void TestNoLostDeletesOrUpdates()
                                 }
                                 if (Random.NextBoolean()) // update only numeric field
                                 {
-                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString()), "f", value);
-                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString()), "cf", value * 2);
+                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "f", value);
+                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "cf", value * 2);
                                 }
                                 else if (Random.NextBoolean())
                                 {
-                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString()), "bf", TestBinaryDocValuesUpdates.ToBytes(value));
-                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString()), "bcf", TestBinaryDocValuesUpdates.ToBytes(value * 2));
+                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "bf", TestBinaryDocValuesUpdates.ToBytes(value));
+                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "bcf", TestBinaryDocValuesUpdates.ToBytes(value * 2));
                                 }
                                 else
                                 {
-                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString()), "f", value);
-                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString()), "cf", value * 2);
-                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString()), "bf", TestBinaryDocValuesUpdates.ToBytes(value));
-                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString()), "bcf", TestBinaryDocValuesUpdates.ToBytes(value * 2));
+                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "f", value);
+                                    w.UpdateNumericDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "cf", value * 2);
+                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "bf", TestBinaryDocValuesUpdates.ToBytes(value));
+                                    w.UpdateBinaryDocValue(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture)), "bcf", TestBinaryDocValuesUpdates.ToBytes(value * 2));
                                 }
                             }
 
@@ -2194,10 +2195,10 @@ public virtual void TestNoLostDeletesOrUpdates()
                             {
                                 if (Verbose)
                                 {
-                                    Console.WriteLine("  delete id=" + (docBase + i));
+                                    Console.WriteLine("  delete id=" + (docBase + i).ToString(CultureInfo.InvariantCulture));
                                 }
                                 deleteCount++;
-                                w.DeleteDocuments(new Term("id", "" + (docBase + i)));
+                                w.DeleteDocuments(new Term("id", (docBase + i).ToString(CultureInfo.InvariantCulture))); // LUCENENET: using InvariantCulture ToString overload instead of implicit `"" +` conversion
                             }
                         }
                     }