移除 FreeSql.DbContext，成为独立项目

FreeSql.DbContext/UnitOfWork/UnitOfWork.cs

@@ -1,73 +0,0 @@
-using SafeObjectPool;
-using System;
-using System.Collections.Generic;
-using System.Data.Common;
-using System.Linq.Expressions;
-using System.Text;
-
-namespace FreeSql {
-	class UnitOfWork : IUnitOfWork {
-
-		protected IFreeSql _fsql;
-		protected Object<DbConnection> _conn;
-		protected DbTransaction _tran;
-
-		public UnitOfWork(IFreeSql fsql) {
-			_fsql = fsql;
-		}
-
-		void ReturnObject() {
-			_fsql.Ado.MasterPool.Return(_conn);
-			_tran = null;
-			_conn = null;
-		}
-		public DbTransaction GetOrBeginTransaction(bool isCreate = true) {
-
-			if (_tran != null) return _tran;
-			if (isCreate == false) return null;
-			if (_conn != null) _fsql.Ado.MasterPool.Return(_conn);
-
-			_conn = _fsql.Ado.MasterPool.Get();
-			try {
-				_tran = _conn.Value.BeginTransaction();
-			} catch {
-				ReturnObject();
-				throw;
-			}
-			return _tran;
-		}
-
-		public void Commit() {
-			if (_tran != null) {
-				try {
-					_tran.Commit();
-				} finally {
-					ReturnObject();
-				}
-			}
-		}
-		public void Rollback() {
-			if (_tran != null) {
-				try {
-					_tran.Rollback();
-				} finally {
-					ReturnObject();
-				}
-			}
-		}
-		~UnitOfWork() {
-			this.Dispose();
-		}
-		bool _isdisposed = false;
-		public void Dispose() {
-			if (_isdisposed) return;
-			try {
-				this.Rollback();
-			} finally {
-				_isdisposed = true;
-				GC.SuppressFinalize(this);
-			}
-		}
-
-	}
-}