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diff --git a/release-notes/7.0/preview/api-diff/preview6/Microsoft.NETCore.App/7.0-preview6_System.Data.Common.md b/release-notes/7.0/preview/api-diff/preview6/Microsoft.NETCore.App/7.0-preview6_System.Data.Common.md
new file mode 100644
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+++ b/release-notes/7.0/preview/api-diff/preview6/Microsoft.NETCore.App/7.0-preview6_System.Data.Common.md
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+# System.Data.Common
+
+``` diff
+ namespace System.Data.Common {
++    public abstract class DbDataSource : IAsyncDisposable, IDisposable {
++        protected DbDataSource();
++        public abstract string ConnectionString { get; }
++        public DbBatch CreateBatch();
++        public DbCommand CreateCommand(string? commandText = null);
++        public DbConnection CreateConnection();
++        protected virtual DbBatch CreateDbBatch();
++        protected virtual DbCommand CreateDbCommand(string? commandText = null);
++        protected abstract DbConnection CreateDbConnection();
++        public void Dispose();
++        protected virtual void Dispose(bool disposing);
++        public ValueTask DisposeAsync();
++        protected virtual ValueTask DisposeAsyncCore();
++        public DbConnection OpenConnection();
++        public ValueTask<DbConnection> OpenConnectionAsync(CancellationToken cancellationToken = default(CancellationToken));
++        protected virtual DbConnection OpenDbConnection();
++        protected virtual ValueTask<DbConnection> OpenDbConnectionAsync(CancellationToken cancellationToken = default(CancellationToken));
++    }
+     public abstract class DbProviderFactory {
++        public virtual DbDataSource CreateDataSource(string connectionString);
+     }
+ }
+```
+