diff --git a/clang/lib/Format/FormatToken.h b/clang/lib/Format/FormatToken.h
index b00b8ab7b927ce..fa76da15a53d3a 100644
--- a/clang/lib/Format/FormatToken.h
+++ b/clang/lib/Format/FormatToken.h
@@ -954,6 +954,7 @@ struct AdditionalKeywords {
     kw_event = &IdentTable.get("event");
     kw_fixed = &IdentTable.get("fixed");
     kw_foreach = &IdentTable.get("foreach");
+    kw_init = &IdentTable.get("init");
     kw_implicit = &IdentTable.get("implicit");
     kw_internal = &IdentTable.get("internal");
     kw_lock = &IdentTable.get("lock");
@@ -986,11 +987,11 @@ struct AdditionalKeywords {
 
     CSharpExtraKeywords = std::unordered_set<IdentifierInfo *>(
         {kw_base, kw_byte, kw_checked, kw_decimal, kw_delegate, kw_event,
-         kw_fixed, kw_foreach, kw_implicit, kw_in, kw_interface, kw_internal,
-         kw_is, kw_lock, kw_null, kw_object, kw_out, kw_override, kw_params,
-         kw_readonly, kw_ref, kw_string, kw_stackalloc, kw_sbyte, kw_sealed,
-         kw_uint, kw_ulong, kw_unchecked, kw_unsafe, kw_ushort, kw_when,
-         kw_where,
+         kw_fixed, kw_foreach, kw_implicit, kw_in, kw_init, kw_interface,
+         kw_internal, kw_is, kw_lock, kw_null, kw_object, kw_out, kw_override,
+         kw_params, kw_readonly, kw_ref, kw_string, kw_stackalloc, kw_sbyte,
+         kw_sealed, kw_uint, kw_ulong, kw_unchecked, kw_unsafe, kw_ushort,
+         kw_when, kw_where,
          // Keywords from the JavaScript section.
          kw_as, kw_async, kw_await, kw_declare, kw_finally, kw_from,
          kw_function, kw_get, kw_import, kw_is, kw_let, kw_module, kw_readonly,
@@ -1078,6 +1079,7 @@ struct AdditionalKeywords {
   IdentifierInfo *kw_fixed;
   IdentifierInfo *kw_foreach;
   IdentifierInfo *kw_implicit;
+  IdentifierInfo *kw_init;
   IdentifierInfo *kw_internal;
 
   IdentifierInfo *kw_lock;
diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 3015cd2be8879a..236e9a73b33a82 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -1652,7 +1652,7 @@ class AnnotatingParser {
             Current.Previous->isOneOf(
                 tok::kw_namespace, tok::r_paren, tok::r_square, tok::r_brace,
                 tok::kw_false, tok::kw_true, Keywords.kw_type, Keywords.kw_get,
-                Keywords.kw_set) ||
+                Keywords.kw_init, Keywords.kw_set) ||
             Current.Previous->Tok.isLiteral()) {
           Current.setType(TT_NonNullAssertion);
           return;
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index a62aa5e6498394..994b197347bc1f 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1837,16 +1837,16 @@ bool UnwrappedLineParser::tryToParsePropertyAccessor() {
   FormatToken *Tok = Tokens->getNextToken();
 
   // A trivial property accessor is of the form:
-  // { [ACCESS_SPECIFIER] [get]; [ACCESS_SPECIFIER] [set] }
+  // { [ACCESS_SPECIFIER] [get]; [ACCESS_SPECIFIER] [set|init] }
   // Track these as they do not require line breaks to be introduced.
-  bool HasGetOrSet = false;
+  bool HasSpecialAccessor = false;
   bool IsTrivialPropertyAccessor = true;
   while (!eof()) {
     if (Tok->isOneOf(tok::semi, tok::kw_public, tok::kw_private,
                      tok::kw_protected, Keywords.kw_internal, Keywords.kw_get,
-                     Keywords.kw_set)) {
-      if (Tok->isOneOf(Keywords.kw_get, Keywords.kw_set))
-        HasGetOrSet = true;
+                     Keywords.kw_init, Keywords.kw_set)) {
+      if (Tok->isOneOf(Keywords.kw_get, Keywords.kw_init, Keywords.kw_set))
+        HasSpecialAccessor = true;
       Tok = Tokens->getNextToken();
       continue;
     }
@@ -1855,7 +1855,7 @@ bool UnwrappedLineParser::tryToParsePropertyAccessor() {
     break;
   }
 
-  if (!HasGetOrSet) {
+  if (!HasSpecialAccessor) {
     Tokens->setPosition(StoredPosition);
     return false;
   }
@@ -1897,7 +1897,8 @@ bool UnwrappedLineParser::tryToParsePropertyAccessor() {
       nextToken();
       break;
     default:
-      if (FormatTok->isOneOf(Keywords.kw_get, Keywords.kw_set) &&
+      if (FormatTok->isOneOf(Keywords.kw_get, Keywords.kw_init,
+                             Keywords.kw_set) &&
           !IsTrivialPropertyAccessor) {
         // Non-trivial get/set needs to be on its own line.
         addUnwrappedLine();
diff --git a/clang/unittests/Format/FormatTestCSharp.cpp b/clang/unittests/Format/FormatTestCSharp.cpp
index 26c62c145064db..2a7642012a5f9a 100644
--- a/clang/unittests/Format/FormatTestCSharp.cpp
+++ b/clang/unittests/Format/FormatTestCSharp.cpp
@@ -960,9 +960,11 @@ TEST_F(FormatTestCSharp, CSharpPropertyAccessors) {
   verifyFormat("int Value { get; } = 0", Style);
   verifyFormat("int Value { set }", Style);
   verifyFormat("int Value { set; }", Style);
+  verifyFormat("int Value { init; }", Style);
   verifyFormat("int Value { internal set; }", Style);
   verifyFormat("int Value { set; } = 0", Style);
   verifyFormat("int Value { get; set }", Style);
+  verifyFormat("int Value { get; init; }", Style);
   verifyFormat("int Value { set; get }", Style);
   verifyFormat("int Value { get; private set; }", Style);
   verifyFormat("int Value { get; set; }", Style);
@@ -974,6 +976,18 @@ TEST_F(FormatTestCSharp, CSharpPropertyAccessors) {
 public string Name {
   get => _name;
   set => _name = value;
+})",
+               Style);
+  verifyFormat(R"(//
+public string Name {
+  init => _name = value;
+  get => _name;
+})",
+               Style);
+  verifyFormat(R"(//
+public string Name {
+  set => _name = value;
+  get => _name;
 })",
                Style);