diff --git a/accounting/service.proto b/accounting/service.proto
index c320106..12fca58 100644
--- a/accounting/service.proto
+++ b/accounting/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package accounting;
 option go_package = "github.com/nspcc-dev/neofs-api/accounting";
+option csharp_namespace = "NeoFS.API.Accounting";
 
 import "service/meta.proto";
 import "service/verify.proto";
diff --git a/accounting/types.proto b/accounting/types.proto
index 1af83c1..1c0cd57 100644
--- a/accounting/types.proto
+++ b/accounting/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package accounting;
 option go_package = "github.com/nspcc-dev/neofs-api/accounting";
+option csharp_namespace = "NeoFS.API.Accounting";
 
 import "decimal/decimal.proto";
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
diff --git a/accounting/withdraw.proto b/accounting/withdraw.proto
index 85000b9..ee23b5d 100644
--- a/accounting/withdraw.proto
+++ b/accounting/withdraw.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package accounting;
 option go_package = "github.com/nspcc-dev/neofs-api/accounting";
+option csharp_namespace = "NeoFS.API.Accounting";
 
 import "service/meta.proto";
 import "service/verify.proto";
diff --git a/bootstrap/service.proto b/bootstrap/service.proto
index fa0248c..db43bf6 100644
--- a/bootstrap/service.proto
+++ b/bootstrap/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package bootstrap;
 option go_package = "github.com/nspcc-dev/neofs-api/bootstrap";
+option csharp_namespace = "NeoFS.API.Bootstrap";
 
 import "service/meta.proto";
 import "service/verify.proto";
diff --git a/bootstrap/types.proto b/bootstrap/types.proto
index 02da9ad..cbce379 100644
--- a/bootstrap/types.proto
+++ b/bootstrap/types.proto
@@ -1,10 +1,11 @@
 syntax = "proto3";
 package bootstrap;
 option go_package = "github.com/nspcc-dev/neofs-api/bootstrap";
+option csharp_namespace = "NeoFS.API.Bootstrap";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
-option (gogoproto.stable_marshaler_all) = true;;
+option (gogoproto.stable_marshaler_all) = true;
 
 option (gogoproto.stringer_all) =  false;
 option (gogoproto.goproto_stringer_all) = false;
diff --git a/container/service.proto b/container/service.proto
index 4576197..b287a22 100644
--- a/container/service.proto
+++ b/container/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package container;
 option go_package = "github.com/nspcc-dev/neofs-api/container";
+option csharp_namespace = "NeoFS.API.Container";
 
 import "service/meta.proto";
 import "service/verify.proto";
diff --git a/container/types.proto b/container/types.proto
index e53587e..775d84c 100644
--- a/container/types.proto
+++ b/container/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package container;
 option go_package = "github.com/nspcc-dev/neofs-api/container";
+option csharp_namespace = "NeoFS.API.Container";
 
 import "github.com/nspcc-dev/netmap/selector.proto";
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
diff --git a/decimal/decimal.proto b/decimal/decimal.proto
index e0e16d5..d21ce1b 100644
--- a/decimal/decimal.proto
+++ b/decimal/decimal.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package decimal;
 option go_package = "github.com/nspcc-dev/neofs-api/decimal";
+option csharp_namespace = "NeoFS.API.Decimal";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/object/service.proto b/object/service.proto
index 662bf8a..f208472 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package object;
 option go_package = "github.com/nspcc-dev/neofs-api/object";
+option csharp_namespace = "NeoFS.API.Object";
 
 import "refs/types.proto";
 import "object/types.proto";
diff --git a/object/types.proto b/object/types.proto
index 5a0b98e..3abe725 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package object;
 option go_package = "github.com/nspcc-dev/neofs-api/object";
+option csharp_namespace = "NeoFS.API.Object";
 
 import "refs/types.proto";
 import "session/types.proto";
diff --git a/query/types.proto b/query/types.proto
index 90f4bbf..0d35154 100644
--- a/query/types.proto
+++ b/query/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package query;
 option go_package = "github.com/nspcc-dev/neofs-api/query";
+option csharp_namespace = "NeoFS.API.Query";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/refs/types.proto b/refs/types.proto
index c526d56..d552d6c 100644
--- a/refs/types.proto
+++ b/refs/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package refs;
 option go_package = "github.com/nspcc-dev/neofs-api/refs";
+option csharp_namespace = "NeoFS.API.Refs";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/service/meta.proto b/service/meta.proto
index f2cfe8f..5ca3633 100644
--- a/service/meta.proto
+++ b/service/meta.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package service;
 option go_package = "github.com/nspcc-dev/neofs-api/service";
+option csharp_namespace = "NeoFS.API.Service";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/service/verify.proto b/service/verify.proto
index 6a4a0e0..d241d88 100644
--- a/service/verify.proto
+++ b/service/verify.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package service;
 option go_package = "github.com/nspcc-dev/neofs-api/service";
+option csharp_namespace = "NeoFS.API.Service";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/session/service.proto b/session/service.proto
index 95ea9c5..2c96a3e 100644
--- a/session/service.proto
+++ b/session/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package session;
 option go_package = "github.com/nspcc-dev/neofs-api/session";
+option csharp_namespace = "NeoFS.API.Session";
 
 import "session/types.proto";
 import "service/meta.proto";
diff --git a/session/types.proto b/session/types.proto
index 79b24ff..0cf1583 100644
--- a/session/types.proto
+++ b/session/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package session;
 option go_package = "github.com/nspcc-dev/neofs-api/session";
+option csharp_namespace = "NeoFS.API.Session";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
diff --git a/state/service.proto b/state/service.proto
index 7966d43..312d465 100644
--- a/state/service.proto
+++ b/state/service.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package state;
 option go_package = "github.com/nspcc-dev/neofs-api/state";
+option csharp_namespace = "NeoFS.API.State";
 
 import "service/meta.proto";
 import "service/verify.proto";
diff --git a/storagegroup/types.proto b/storagegroup/types.proto
index 238b454..41a211f 100644
--- a/storagegroup/types.proto
+++ b/storagegroup/types.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 package storagegroup;
 option go_package = "github.com/nspcc-dev/neofs-api/storagegroup";
+option csharp_namespace = "NeoFS.API.StorageGroup";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";