Implement DbDataSource

src/libraries/System.Data.Common/ref/System.Data.Common.cs

@@ -2405,6 +2405,24 @@ protected DbDataRecord() { }
         System.ComponentModel.PropertyDescriptorCollection System.ComponentModel.ICustomTypeDescriptor.GetProperties(System.Attribute[]? attributes) { throw null; }
         object System.ComponentModel.ICustomTypeDescriptor.GetPropertyOwner(System.ComponentModel.PropertyDescriptor? pd) { throw null; }
     }
+    public abstract class DbDataSource : IDisposable, IAsyncDisposable
+    {
+        public abstract string ConnectionString { get; }
+        protected abstract System.Data.Common.DbConnection CreateDbConnection();
+        protected virtual System.Data.Common.DbConnection OpenDbConnection() { throw null; }
+        protected virtual System.Threading.Tasks.ValueTask<System.Data.Common.DbConnection> OpenDbConnectionAsync(System.Threading.CancellationToken cancellationToken = default)  { throw null; }
+        protected virtual System.Data.Common.DbCommand CreateDbCommand(string? commandText = null) { throw null; }
+        protected virtual System.Data.Common.DbBatch CreateDbBatch() { throw null; }
+        public System.Data.Common.DbConnection CreateConnection() { throw null; }
+        public System.Data.Common.DbConnection OpenConnection() { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbConnection> OpenConnectionAsync(System.Threading.CancellationToken cancellationToken = default) { throw null; }
+        public System.Data.Common.DbCommand CreateCommand(string? commandText = null) { throw null; }
+        public System.Data.Common.DbBatch CreateBatch() { throw null; }
+        public void Dispose() { throw null; }
+        public System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
+        protected virtual void Dispose(bool disposing) { throw null; }
+        protected virtual System.Threading.Tasks.ValueTask DisposeAsyncCore() { throw null; }
+    }
     public abstract partial class DbDataSourceEnumerator
     {
         protected DbDataSourceEnumerator() { }
@@ -2606,6 +2624,7 @@ protected DbProviderFactory() { }
         public virtual System.Data.Common.DbDataAdapter? CreateDataAdapter() { throw null; }
         public virtual System.Data.Common.DbDataSourceEnumerator? CreateDataSourceEnumerator() { throw null; }
         public virtual System.Data.Common.DbParameter? CreateParameter() { throw null; }
+        public virtual System.Data.Common.DbDataSource CreateDataSource(string connectionString) { throw null; }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
     public sealed partial class DbProviderSpecificTypePropertyAttribute : System.Attribute

src/libraries/System.Data.Common/src/Resources/Strings.resx

@@ -156,6 +156,8 @@
   <data name="Expr_InvalidTimeZoneRange" xml:space="preserve"><value>Provided range for time one exceeds total of 14 hours.</value></data>
   <data name="Expr_MismatchKindandTimeSpan" xml:space="preserve"><value>Kind property of provided DateTime argument, does not match 'hours' and 'minutes' arguments.</value></data>
   <data name="Expr_UnsupportedType" xml:space="preserve"><value>A DataColumn of type '{0}' does not support expression.</value></data>
+  <data name="Batch_NotSupportedOnDataSourceBatch" xml:space="preserve"><value>Connection and transaction access is not supported on batches created from DbDataSource.</value></data>
+  <data name="Command_NotSupportedOnDataSourceCommand" xml:space="preserve"><value>Connection and transaction access is not supported on commands created from DbDataSource.</value></data>
   <data name="Data_EnforceConstraints" xml:space="preserve"><value>Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.</value></data>
   <data name="Data_CannotModifyCollection" xml:space="preserve"><value>Collection itself is not modifiable.</value></data>
   <data name="Data_CaseInsensitiveNameConflict" xml:space="preserve"><value>The given name '{0}' matches at least two names in the collection object with different cases, but does not match either of them with the same case.</value></data>

src/libraries/System.Data.Common/src/System.Data.Common.csproj

@@ -210,6 +210,7 @@
     <Compile Include="System\Data\Common\DbDataReader.cs" />
     <Compile Include="System\Data\Common\DbDataReaderExtensions.cs" />
     <Compile Include="System\Data\Common\DbDataRecord.cs" />
+    <Compile Include="System\Data\Common\DbDataSource.cs" />
     <Compile Include="System\Data\Common\DbDataSourceEnumerator.cs" />
     <Compile Include="System\Data\Common\DbEnumerator.cs" />
     <Compile Include="System\Data\Common\DbException.cs" />
@@ -224,6 +225,7 @@
     <Compile Include="System\Data\Common\DBSchemaTable.cs" />
     <Compile Include="System\Data\Common\DbTransaction.cs" />
     <Compile Include="System\Data\Common\DecimalStorage.cs" />
+    <Compile Include="System\Data\Common\DefaultDataSource.cs" />
     <Compile Include="System\Data\Common\DoubleStorage.cs" />
     <Compile Include="System\Data\Common\FieldNameLookup.cs" />
     <Compile Include="System\Data\Common\Groupbybehavior.cs" />